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desruisseaux pushed a commit to branch geoapi-4.0
in repository https://gitbox.apache.org/repos/asf/sis.git

commit 330ec3074e3094f47b4d8d937fa3124b60af18e9
Author: Martin Desruisseaux <[email protected]>
AuthorDate: Thu Sep 8 18:34:50 2022 +0200

    Suppress warnings about fields that are not statically typed as 
serializable.
    Applied only on metadata implementation classes for now.
---
 .../org/apache/sis/metadata/MetadataStandard.java  |  1 +
 .../apache/sis/metadata/PropertyInformation.java   |  1 +
 .../iso/DefaultApplicationSchemaInformation.java   |  4 ++++
 .../iso/DefaultExtendedElementInformation.java     |  7 +++++++
 .../apache/sis/metadata/iso/DefaultIdentifier.java |  2 ++
 .../apache/sis/metadata/iso/DefaultMetadata.java   | 23 +++++++++++++++++++++-
 .../iso/DefaultMetadataExtensionInformation.java   |  2 ++
 .../sis/metadata/iso/DefaultMetadataScope.java     |  1 +
 .../iso/DefaultPortrayalCatalogueReference.java    |  1 +
 .../org/apache/sis/metadata/iso/ISOMetadata.java   |  1 +
 .../acquisition/DefaultAcquisitionInformation.java |  7 +++++++
 .../acquisition/DefaultEnvironmentalRecord.java    |  1 +
 .../sis/metadata/iso/acquisition/DefaultEvent.java |  3 +++
 .../iso/acquisition/DefaultInstrument.java         |  4 ++++
 .../metadata/iso/acquisition/DefaultObjective.java |  7 +++++++
 .../metadata/iso/acquisition/DefaultOperation.java | 10 ++++++++++
 .../sis/metadata/iso/acquisition/DefaultPlan.java  |  3 +++
 .../metadata/iso/acquisition/DefaultPlatform.java  |  4 ++++
 .../iso/acquisition/DefaultPlatformPass.java       |  2 ++
 .../iso/acquisition/DefaultRequirement.java        |  5 +++++
 .../sis/metadata/iso/citation/AbstractParty.java   |  2 ++
 .../sis/metadata/iso/citation/DefaultAddress.java  |  5 +++++
 .../sis/metadata/iso/citation/DefaultCitation.java | 11 +++++++++++
 .../sis/metadata/iso/citation/DefaultContact.java  |  6 ++++++
 .../metadata/iso/citation/DefaultIndividual.java   |  1 +
 .../iso/citation/DefaultOnlineResource.java        |  2 ++
 .../metadata/iso/citation/DefaultOrganisation.java |  2 ++
 .../iso/citation/DefaultResponsibility.java        |  2 ++
 .../sis/metadata/iso/citation/DefaultSeries.java   |  3 +++
 .../metadata/iso/citation/DefaultTelephone.java    |  1 +
 .../iso/constraint/DefaultConstraints.java         |  6 ++++++
 .../iso/constraint/DefaultLegalConstraints.java    |  3 +++
 .../iso/constraint/DefaultReleasability.java       |  3 +++
 .../iso/constraint/DefaultSecurityConstraints.java |  3 +++
 .../iso/content/DefaultAttributeGroup.java         |  2 ++
 .../sis/metadata/iso/content/DefaultBand.java      |  1 +
 .../iso/content/DefaultCoverageDescription.java    |  4 ++++
 .../DefaultFeatureCatalogueDescription.java        |  3 +++
 .../iso/content/DefaultFeatureTypeInfo.java        |  1 +
 .../iso/content/DefaultImageDescription.java       |  1 +
 .../iso/content/DefaultRangeDimension.java         |  3 +++
 .../content/DefaultRangeElementDescription.java    |  3 +++
 .../iso/content/DefaultSampleDimension.java        |  3 +++
 .../metadata/iso/distribution/DefaultDataFile.java |  3 +++
 .../DefaultDigitalTransferOptions.java             |  5 +++++
 .../iso/distribution/DefaultDistribution.java      |  4 ++++
 .../iso/distribution/DefaultDistributor.java       |  4 ++++
 .../metadata/iso/distribution/DefaultFormat.java   |  5 +++++
 .../metadata/iso/distribution/DefaultMedium.java   |  4 ++++
 .../distribution/DefaultStandardOrderProcess.java  |  5 +++++
 .../iso/extent/DefaultBoundingPolygon.java         |  1 +
 .../sis/metadata/iso/extent/DefaultExtent.java     |  4 ++++
 .../iso/extent/DefaultGeographicDescription.java   |  1 +
 .../iso/extent/DefaultSpatialTemporalExtent.java   |  2 ++
 .../metadata/iso/extent/DefaultTemporalExtent.java |  1 +
 .../metadata/iso/extent/DefaultVerticalExtent.java |  1 +
 .../iso/identification/AbstractIdentification.java | 20 +++++++++++++++++++
 .../identification/DefaultAssociatedResource.java  |  2 ++
 .../iso/identification/DefaultBrowseGraphic.java   |  3 +++
 .../iso/identification/DefaultCoupledResource.java |  4 ++++
 .../identification/DefaultDataIdentification.java  |  3 +++
 .../iso/identification/DefaultKeywordClass.java    |  3 ++-
 .../iso/identification/DefaultKeywords.java        |  4 +++-
 .../DefaultOperationChainMetadata.java             |  3 +++
 .../identification/DefaultOperationMetadata.java   |  6 ++++++
 .../DefaultRepresentativeFraction.java             |  1 +
 .../iso/identification/DefaultResolution.java      |  1 +
 .../DefaultServiceIdentification.java              | 10 ++++++++++
 .../metadata/iso/identification/DefaultUsage.java  |  6 ++++++
 .../sis/metadata/iso/lineage/DefaultAlgorithm.java |  2 ++
 .../sis/metadata/iso/lineage/DefaultLineage.java   |  5 +++++
 .../metadata/iso/lineage/DefaultProcessStep.java   | 10 ++++++++++
 .../iso/lineage/DefaultProcessStepReport.java      |  3 +++
 .../metadata/iso/lineage/DefaultProcessing.java    |  5 +++++
 .../sis/metadata/iso/lineage/DefaultSource.java    |  9 +++++++++
 .../maintenance/DefaultMaintenanceInformation.java |  5 +++++
 .../sis/metadata/iso/maintenance/DefaultScope.java |  2 ++
 .../iso/maintenance/DefaultScopeDescription.java   |  1 +
 .../sis/metadata/iso/quality/AbstractElement.java  |  7 +++++++
 .../iso/quality/DefaultConformanceResult.java      |  2 ++
 .../iso/quality/DefaultCoverageResult.java         |  4 ++++
 .../metadata/iso/quality/DefaultDataQuality.java   |  3 +++
 .../iso/quality/DefaultQuantitativeResult.java     |  4 ++++
 .../spatial/AbstractGeolocationInformation.java    |  1 +
 .../sis/metadata/iso/spatial/DefaultDimension.java |  2 ++
 .../sis/metadata/iso/spatial/DefaultGCP.java       |  2 ++
 .../metadata/iso/spatial/DefaultGCPCollection.java |  3 +++
 .../metadata/iso/spatial/DefaultGeorectified.java  |  6 ++++++
 .../iso/spatial/DefaultGeoreferenceable.java       |  4 ++++
 .../spatial/DefaultGridSpatialRepresentation.java  |  1 +
 .../DefaultVectorSpatialRepresentation.java        |  1 +
 .../java/org/apache/sis/util/iso/AbstractName.java |  1 +
 .../org/apache/sis/util/iso/DefaultLocalName.java  |  2 ++
 .../org/apache/sis/util/iso/DefaultMemberName.java |  1 +
 .../org/apache/sis/util/iso/DefaultNameSpace.java  |  1 +
 .../org/apache/sis/util/iso/DefaultRecord.java     |  2 ++
 .../org/apache/sis/util/iso/DefaultRecordType.java |  2 ++
 .../org/apache/sis/util/iso/RecordDefinition.java  |  1 +
 98 files changed, 355 insertions(+), 3 deletions(-)

diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/MetadataStandard.java 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/MetadataStandard.java
index 3ac23f942c..986a3ba754 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/MetadataStandard.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/MetadataStandard.java
@@ -163,6 +163,7 @@ public class MetadataStandard implements Serializable {
      *
      * @see #getCitation()
      */
+    @SuppressWarnings("serial")         // Not statically typed as 
Serializable.
     final Citation citation;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/PropertyInformation.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/PropertyInformation.java
index a0ebf71833..7b0f3b900c 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/PropertyInformation.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/PropertyInformation.java
@@ -118,6 +118,7 @@ final class PropertyInformation<E> extends SimpleIdentifier 
          // Impleme
      *
      * @see #getDomainValue()
      */
+    @SuppressWarnings("serial")         // Not statically typed as 
Serializable.
     private volatile Object domainValue;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultApplicationSchemaInformation.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultApplicationSchemaInformation.java
index 2621e3b74f..910e5ee3bb 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultApplicationSchemaInformation.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultApplicationSchemaInformation.java
@@ -75,6 +75,7 @@ public class DefaultApplicationSchemaInformation extends 
ISOMetadata implements
     /**
      * Name of the application schema used.
      */
+    @SuppressWarnings("serial")
     private Citation name;
 
     /**
@@ -90,16 +91,19 @@ public class DefaultApplicationSchemaInformation extends 
ISOMetadata implements
     /**
      * Full application schema given as an ASCII file.
      */
+    @SuppressWarnings("serial")
     private CharSequence schemaAscii;
 
     /**
      * Full application schema given as a graphics file.
      */
+    @SuppressWarnings("serial")
     private OnlineResource graphicsFile;
 
     /**
      * Full application schema given as a software development file.
      */
+    @SuppressWarnings("serial")
     private OnlineResource softwareDevelopmentFile;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultExtendedElementInformation.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultExtendedElementInformation.java
index 33417a1780..1068f8ce47 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultExtendedElementInformation.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultExtendedElementInformation.java
@@ -125,6 +125,7 @@ public class DefaultExtendedElementInformation extends 
ISOMetadata implements Ex
     /**
      * Definition of the extended element.
      */
+    @SuppressWarnings("serial")
     private InternationalString definition;
 
     /**
@@ -137,6 +138,7 @@ public class DefaultExtendedElementInformation extends 
ISOMetadata implements Ex
      * Non-null value only if the {@linkplain #getObligation() obligation}
      * is {@linkplain Obligation#CONDITIONAL conditional}.
      */
+    @SuppressWarnings("serial")
     private InternationalString condition;
 
     /**
@@ -160,27 +162,32 @@ public class DefaultExtendedElementInformation extends 
ISOMetadata implements Ex
      * {@linkplain Datatype#CODE_LIST code list} or {@linkplain 
Datatype#CODE_LIST_ELEMENT
      * code list element}.
      */
+    @SuppressWarnings("serial")
     private InternationalString domainValue;
 
     /**
      * Name of the metadata entity(s) under which this extended metadata 
element may appear.
      * The name(s) may be standard metadata element(s) or other extended 
metadata element(s).
      */
+    @SuppressWarnings("serial")
     private Collection<String> parentEntity;
 
     /**
      * Specifies how the extended element relates to other existing elements 
and entities.
      */
+    @SuppressWarnings("serial")
     private InternationalString rule;
 
     /**
      * Reason for creating the extended element.
      */
+    @SuppressWarnings("serial")
     private InternationalString rationale;
 
     /**
      * Name of the person or organization creating the extended element.
      */
+    @SuppressWarnings("serial")
     private Collection<Responsibility> sources;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultIdentifier.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultIdentifier.java
index 443556d6e2..0c6f42cabe 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultIdentifier.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultIdentifier.java
@@ -114,6 +114,7 @@ public class DefaultIdentifier extends ISOMetadata 
implements Identifier {
      *
      * @see #getAuthority()
      */
+    @SuppressWarnings("serial")
     private Citation authority;
 
     /**
@@ -144,6 +145,7 @@ public class DefaultIdentifier extends ISOMetadata 
implements Identifier {
      *
      * @see #getDescription()
      */
+    @SuppressWarnings("serial")
     private InternationalString description;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultMetadata.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultMetadata.java
index b9539f8e6b..abc7628372 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultMetadata.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultMetadata.java
@@ -144,7 +144,6 @@ import org.apache.sis.math.FunctionProperty;
  * @since 0.3
  * @module
  */
-@SuppressWarnings("serial")                             // Fields are not 
statically typed as Serializable.
 @XmlType(name = "MD_Metadata_Type", propOrder = {
     // Attributes new in ISO 19115:2014
     "metadataIdentifier",
@@ -208,112 +207,134 @@ public class DefaultMetadata extends ISOMetadata 
implements Metadata {
     /**
      * Language(s) and character set(s) used within the dataset.
      */
+    @SuppressWarnings("serial")
     private Map<Locale,Charset> locales;
 
     /**
      * Identification of the parent metadata record.
      */
+    @SuppressWarnings("serial")
     private Citation parentMetadata;
 
     /**
      * Scope to which the metadata applies.
      */
+    @SuppressWarnings("serial")
     private Collection<MetadataScope> metadataScopes;
 
     /**
      * Parties responsible for the metadata information.
      */
+    @SuppressWarnings("serial")
     private Collection<Responsibility> contacts;
 
     /**
      * Date(s) associated with the metadata.
      */
+    @SuppressWarnings("serial")
     private Collection<CitationDate> dateInfo;
 
     /**
      * Citation(s) for the standard(s) to which the metadata conform.
      */
+    @SuppressWarnings("serial")
     private Collection<Citation> metadataStandards;
 
     /**
      * Citation(s) for the profile(s) of the metadata standard to which the 
metadata conform.
      */
+    @SuppressWarnings("serial")
     private Collection<Citation> metadataProfiles;
 
     /**
      * Reference(s) to alternative metadata or metadata in a non-ISO standard 
for the same resource.
      */
+    @SuppressWarnings("serial")
     private Collection<Citation> alternativeMetadataReferences;
 
     /**
      * Online location(s) where the metadata is available.
      */
+    @SuppressWarnings("serial")
     private Collection<OnlineResource> metadataLinkages;
 
     /**
      * Digital representation of spatial information in the dataset.
      */
+    @SuppressWarnings("serial")
     private Collection<SpatialRepresentation> spatialRepresentationInfo;
 
     /**
      * Description of the spatial and temporal reference systems used in the 
dataset.
      */
+    @SuppressWarnings("serial")
     private Collection<ReferenceSystem> referenceSystemInfo;
 
     /**
      * Information describing metadata extensions.
      */
+    @SuppressWarnings("serial")
     private Collection<MetadataExtensionInformation> metadataExtensionInfo;
 
     /**
      * Basic information about the resource(s) to which the metadata applies.
      */
+    @SuppressWarnings("serial")
     private Collection<Identification> identificationInfo;
 
     /**
      * Provides information about the feature catalogue and describes the 
coverage and
      * image data characteristics.
      */
+    @SuppressWarnings("serial")
     private Collection<ContentInformation> contentInfo;
 
     /**
      * Provides information about the distributor of and options for obtaining 
the resource(s).
      */
+    @SuppressWarnings("serial")
     private Collection<Distribution> distributionInfo;
 
     /**
      * Provides overall assessment of quality of a resource(s).
      */
+    @SuppressWarnings("serial")
     private Collection<DataQuality> dataQualityInfo;
 
     /**
      * Provides information about the catalogue of rules defined for the 
portrayal of a resource(s).
      */
+    @SuppressWarnings("serial")
     private Collection<PortrayalCatalogueReference> portrayalCatalogueInfo;
 
     /**
      * Provides restrictions on the access and use of metadata.
      */
+    @SuppressWarnings("serial")
     private Collection<Constraints> metadataConstraints;
 
     /**
      * Provides information about the conceptual schema of a dataset.
      */
+    @SuppressWarnings("serial")
     private Collection<ApplicationSchemaInformation> applicationSchemaInfo;
 
     /**
      * Provides information about the frequency of metadata updates, and the 
scope of those updates.
      */
+    @SuppressWarnings("serial")
     private MaintenanceInformation metadataMaintenance;
 
     /**
      * Provides information about the acquisition of the data.
      */
+    @SuppressWarnings("serial")
     private Collection<AcquisitionInformation> acquisitionInformation;
 
     /**
      * Information about the provenance, sources and/or the production 
processes applied to the resource.
      */
+    @SuppressWarnings("serial")
     private Collection<Lineage> resourceLineages;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultMetadataExtensionInformation.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultMetadataExtensionInformation.java
index c3dd686ede..dc5d12fc4d 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultMetadataExtensionInformation.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultMetadataExtensionInformation.java
@@ -61,12 +61,14 @@ public class DefaultMetadataExtensionInformation extends 
ISOMetadata implements
      * Information about on-line sources containing the community profile name 
and
      * the extended metadata elements. Information for all new metadata 
elements.
      */
+    @SuppressWarnings("serial")
     private OnlineResource extensionOnLineResource;
 
     /**
      * Provides information about a new metadata element, not found in ISO 
19115, which is
      * required to describe geographic data.
      */
+    @SuppressWarnings("serial")
     private Collection<ExtendedElementInformation> extendedElementInformation;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultMetadataScope.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultMetadataScope.java
index 55d169e469..c208ef833e 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultMetadataScope.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultMetadataScope.java
@@ -66,6 +66,7 @@ public class DefaultMetadataScope extends ISOMetadata 
implements MetadataScope {
     /**
      * Description of the scope.
      */
+    @SuppressWarnings("serial")
     private InternationalString name;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultPortrayalCatalogueReference.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultPortrayalCatalogueReference.java
index e9c1a644fc..c70a527ea5 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultPortrayalCatalogueReference.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/DefaultPortrayalCatalogueReference.java
@@ -61,6 +61,7 @@ public class DefaultPortrayalCatalogueReference extends 
ISOMetadata implements P
     /**
      * Bibliographic reference to the portrayal catalogue cited.
      */
+    @SuppressWarnings("serial")
     private Collection<Citation> portrayalCatalogueCitations;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/ISOMetadata.java 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/ISOMetadata.java
index db90ca4d28..2ce7f383a3 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/ISOMetadata.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/ISOMetadata.java
@@ -74,6 +74,7 @@ public class ISOMetadata extends ModifiableMetadata 
implements IdentifiedObject,
      * All identifiers associated with this metadata, or {@code null} if none.
      * This field is initialized to a non-null value when first needed.
      */
+    @SuppressWarnings("serial")         // Not statically typed as 
Serializable.
     protected Collection<Identifier> identifiers;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultAcquisitionInformation.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultAcquisitionInformation.java
index 6c99e75b82..80073578e5 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultAcquisitionInformation.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultAcquisitionInformation.java
@@ -69,36 +69,43 @@ public class DefaultAcquisitionInformation extends 
ISOMetadata implements Acquis
     /**
      * Identifies the plan as implemented by the acquisition.
      */
+    @SuppressWarnings("serial")
     private Collection<Plan> acquisitionPlans;
 
     /**
      * Identifies the requirement the data acquisition intends to satisfy.
      */
+    @SuppressWarnings("serial")
     private Collection<Requirement> acquisitionRequirements;
 
     /**
      * A record of the environmental circumstances during the data acquisition.
      */
+    @SuppressWarnings("serial")
     private EnvironmentalRecord environmentalConditions;
 
     /**
      * General information about the instrument used in data acquisition.
      */
+    @SuppressWarnings("serial")
     private Collection<Instrument> instruments;
 
     /**
      * Identification of the area or object to be sensed.
      */
+    @SuppressWarnings("serial")
     private Collection<Objective> objectives;
 
     /**
      * General information about an identifiable activity which provided the 
data.
      */
+    @SuppressWarnings("serial")
     private Collection<Operation> operations;
 
     /**
      * General information about the platform from which the data were taken.
      */
+    @SuppressWarnings("serial")
     private Collection<Platform> platforms;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultEnvironmentalRecord.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultEnvironmentalRecord.java
index 8057770c36..b2fe2a0dac 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultEnvironmentalRecord.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultEnvironmentalRecord.java
@@ -83,6 +83,7 @@ public class DefaultEnvironmentalRecord extends ISOMetadata 
implements Environme
     /**
      * Meteorological conditions in the photo flight area, in particular 
clouds, snow and wind.
      */
+    @SuppressWarnings("serial")
     private InternationalString meteorologicalConditions;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultEvent.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultEvent.java
index 50f29675ca..a3c3324df7 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultEvent.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultEvent.java
@@ -102,16 +102,19 @@ public class DefaultEvent extends ISOMetadata implements 
Event {
     /**
      * Objective or objectives satisfied by an event.
      */
+    @SuppressWarnings("serial")
     private Collection<Objective> expectedObjectives;
 
     /**
      * Pass during which an event occurs.
      */
+    @SuppressWarnings("serial")
     private PlatformPass relatedPass;
 
     /**
      * Instrument or instruments for which the event is meaningful.
      */
+    @SuppressWarnings("serial")
     private Collection<Instrument> relatedSensors;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultInstrument.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultInstrument.java
index 09bf122047..49d94389a9 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultInstrument.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultInstrument.java
@@ -69,21 +69,25 @@ public class DefaultInstrument extends ISOMetadata 
implements Instrument {
     /**
      * Complete citation of the instrument.
      */
+    @SuppressWarnings("serial")
     private Collection<Citation> citations;
 
     /**
      * Name of the type of instrument. Examples: framing, line-scan, 
push-broom, pan-frame.
      */
+    @SuppressWarnings("serial")
     private InternationalString type;
 
     /**
      * Textual description of the instrument.
      */
+    @SuppressWarnings("serial")
     private InternationalString description;
 
     /**
      * Platform on which the instrument is mounted.
      */
+    @SuppressWarnings("serial")
     private Platform mountedOn;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultObjective.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultObjective.java
index c867a72c8f..17e301725b 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultObjective.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultObjective.java
@@ -83,37 +83,44 @@ public class DefaultObjective extends ISOMetadata 
implements Objective {
     /**
      * Priority applied to the target.
      */
+    @SuppressWarnings("serial")
     private InternationalString priority;
 
     /**
      * Collection technique for the objective.
      */
+    @SuppressWarnings("serial")
     private Collection<ObjectiveType> types;
 
     /**
      * Role or purpose performed by or activity performed at the objective.
      */
+    @SuppressWarnings("serial")
     private Collection<InternationalString> functions;
 
     /**
      * Extent information including the bounding box, bounding polygon, 
vertical and
      * temporal extent of the objective.
      */
+    @SuppressWarnings("serial")
     private Collection<Extent> extents;
 
     /**
      * Event or events associated with objective completion.
      */
+    @SuppressWarnings("serial")
     private Collection<Event> objectiveOccurrences;
 
     /**
      * Pass of the platform over the objective.
      */
+    @SuppressWarnings("serial")
     private Collection<PlatformPass> pass;
 
     /**
      * Instrument which senses the objective data.
      */
+    @SuppressWarnings("serial")
     private Collection<Instrument> sensingInstruments;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultOperation.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultOperation.java
index 8aae2383b5..0b0da89791 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultOperation.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultOperation.java
@@ -81,51 +81,61 @@ public class DefaultOperation extends ISOMetadata 
implements Operation {
     /**
      * Description of the mission on which the platform observations are made 
and the objectives of that mission.
      */
+    @SuppressWarnings("serial")
     private InternationalString description;
 
     /**
      * Identification of the mission.
      */
+    @SuppressWarnings("serial")
     private Citation citation;
 
     /**
      * Status of the data acquisition.
      */
+    @SuppressWarnings("serial")
     private Progress status;
 
     /**
      * Collection technique for the operation.
      */
+    @SuppressWarnings("serial")
     private OperationType type;
 
     /**
      * Sub-missions that make up part of a larger mission.
      */
+    @SuppressWarnings("serial")
     private Collection<Operation> childOperations;
 
     /**
      * Object(s) or area(s) of interest to be sensed.
      */
+    @SuppressWarnings("serial")
     private Collection<Objective> objectives;
 
     /**
      * Heritage of the operation.
      */
+    @SuppressWarnings("serial")
     private Operation parentOperation;
 
     /**
      * Plan satisfied by the operation.
      */
+    @SuppressWarnings("serial")
     private Plan plan;
 
     /**
      * Platform (or platforms) used in the operation.
      */
+    @SuppressWarnings("serial")
     private Collection<Platform> platforms;
 
     /**
      * Record of an event occurring during an operation.
      */
+    @SuppressWarnings("serial")
     private Collection<Event> significantEvents;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultPlan.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultPlan.java
index 545b568bdb..b6e14b6bd9 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultPlan.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultPlan.java
@@ -81,16 +81,19 @@ public class DefaultPlan extends ISOMetadata implements 
Plan {
     /**
      * Identification of authority requesting target collection.
      */
+    @SuppressWarnings("serial")
     private Citation citation;
 
     /**
      * Identification of the activity or activities that satisfy a plan.
      */
+    @SuppressWarnings("serial")
     private Collection<Operation> operations;
 
     /**
      * Requirement satisfied by the plan.
      */
+    @SuppressWarnings("serial")
     private Collection<Requirement> satisfiedRequirements;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultPlatform.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultPlatform.java
index 4d751558a8..613f2db343 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultPlatform.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultPlatform.java
@@ -73,21 +73,25 @@ public class DefaultPlatform extends ISOMetadata implements 
Platform {
     /**
      * Source where information about the platform is described.
      */
+    @SuppressWarnings("serial")
     private Citation citation;
 
     /**
      * Narrative description of the platform supporting the instrument.
      */
+    @SuppressWarnings("serial")
     private InternationalString description;
 
     /**
      * Organization responsible for building, launch, or operation of the 
platform.
      */
+    @SuppressWarnings("serial")
     private Collection<Responsibility> sponsors;
 
     /**
      * Instrument(s) mounted on a platform.
      */
+    @SuppressWarnings("serial")
     private Collection<Instrument> instruments;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultPlatformPass.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultPlatformPass.java
index 103296141a..1f11dc98ec 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultPlatformPass.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultPlatformPass.java
@@ -65,11 +65,13 @@ public class DefaultPlatformPass extends ISOMetadata 
implements PlatformPass {
     /**
      * Area covered by the pass.
      */
+    @SuppressWarnings("serial")
     private Geometry extent;
 
     /**
      * Occurrence of one or more events for a pass.
      */
+    @SuppressWarnings("serial")
     private Collection<Event> relatedEvents;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultRequirement.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultRequirement.java
index 0624a193aa..c86fab4b27 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultRequirement.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/acquisition/DefaultRequirement.java
@@ -88,16 +88,19 @@ public class DefaultRequirement extends ISOMetadata 
implements Requirement {
     /**
      * Identification of reference or guidance material for the requirement.
      */
+    @SuppressWarnings("serial")
     private Citation citation;
 
     /**
      * Origin of requirement.
      */
+    @SuppressWarnings("serial")
     private Collection<Responsibility> requestors;
 
     /**
      * Person(s), or body(ies), to receive results of requirement.
      */
+    @SuppressWarnings("serial")
     private Collection<Responsibility> recipients;
 
     /**
@@ -108,6 +111,7 @@ public class DefaultRequirement extends ISOMetadata 
implements Requirement {
     /**
      * Required or preferred acquisition date and time.
      */
+    @SuppressWarnings("serial")
     private RequestedDate requestedDate;
 
     /**
@@ -119,6 +123,7 @@ public class DefaultRequirement extends ISOMetadata 
implements Requirement {
     /**
      * Plan that identifies solution to satisfy the requirement.
      */
+    @SuppressWarnings("serial")
     private Collection<Plan> satisfiedPlans;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/AbstractParty.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/AbstractParty.java
index f779b92724..b1fc9a8eb5 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/AbstractParty.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/AbstractParty.java
@@ -73,11 +73,13 @@ public class AbstractParty extends ISOMetadata implements 
Party {
     /**
      * Name of the party.
      */
+    @SuppressWarnings("serial")
     private InternationalString name;
 
     /**
      * Contact information for the party.
      */
+    @SuppressWarnings("serial")
     private Collection<Contact> contactInfo;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultAddress.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultAddress.java
index 6310f6cd63..4a83a4d374 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultAddress.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultAddress.java
@@ -62,16 +62,19 @@ public class DefaultAddress extends ISOMetadata implements 
Address {
     /**
      * State, province of the location.
      */
+    @SuppressWarnings("serial")
     private InternationalString administrativeArea;
 
     /**
      * The city of the location
      */
+    @SuppressWarnings("serial")
     private InternationalString city;
 
     /**
      * Country of the physical address.
      */
+    @SuppressWarnings("serial")
     private InternationalString country;
 
     /**
@@ -82,11 +85,13 @@ public class DefaultAddress extends ISOMetadata implements 
Address {
     /**
      * Address line for the location (as described in ISO 11180, Annex A).
      */
+    @SuppressWarnings("serial")
     private Collection<InternationalString> deliveryPoints;
 
     /**
      * Address of the electronic mailbox of the responsible organization or 
individual.
      */
+    @SuppressWarnings("serial")
     private Collection<String> electronicMailAddresses;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultCitation.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultCitation.java
index 6e2ff87829..3d010f5933 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultCitation.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultCitation.java
@@ -103,22 +103,26 @@ public class DefaultCitation extends ISOMetadata 
implements Citation {
     /**
      * Name by which the cited resource is known.
      */
+    @SuppressWarnings("serial")
     private InternationalString title;
 
     /**
      * Short name or other language name by which the cited information is 
known.
      * Example: "DCW" as an alternative title for "Digital Chart of the World.
      */
+    @SuppressWarnings("serial")
     private Collection<InternationalString> alternateTitles;
 
     /**
      * Reference date for the cited resource.
      */
+    @SuppressWarnings("serial")
     private Collection<CitationDate> dates;
 
     /**
      * Version of the cited resource.
      */
+    @SuppressWarnings("serial")
     private InternationalString edition;
 
     /**
@@ -131,23 +135,27 @@ public class DefaultCitation extends ISOMetadata 
implements Citation {
      * Roles, Name, contact, and position information for an individual or 
organization that is responsible
      * for the resource.
      */
+    @SuppressWarnings("serial")
     private Collection<Responsibility> citedResponsibleParties;
 
     /**
      * Mode in which the resource is represented, or an empty collection if 
none.
      */
+    @SuppressWarnings("serial")
     private Collection<PresentationForm> presentationForms;
 
     /**
      * Information about the series, or aggregate dataset, of which the 
dataset is a part.
      * May be {@code null} if none.
      */
+    @SuppressWarnings("serial")
     private Series series;
 
     /**
      * Other information required to complete the citation that is not 
recorded elsewhere.
      * May be {@code null} if none.
      */
+    @SuppressWarnings("serial")
     private Collection<InternationalString> otherCitationDetails;
 
     /**
@@ -158,16 +166,19 @@ public class DefaultCitation extends ISOMetadata 
implements Citation {
      * @deprecated Removed as of ISO 19115:2014.
      */
     @Deprecated
+    @SuppressWarnings("serial")
     private InternationalString collectiveTitle;
 
     /**
      * Online references to the cited resource.
      */
+    @SuppressWarnings("serial")
     private Collection<OnlineResource> onlineResources;
 
     /**
      * Citation graphic or logo for cited party.
      */
+    @SuppressWarnings("serial")
     private Collection<BrowseGraphic> graphics;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultContact.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultContact.java
index ea9dd8b2d1..5e8b19e195 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultContact.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultContact.java
@@ -82,31 +82,37 @@ public class DefaultContact extends ISOMetadata implements 
Contact {
     /**
      * Telephone numbers at which the organization or individual may be 
contacted.
      */
+    @SuppressWarnings("serial")
     private Collection<Telephone> phones;
 
     /**
      * Physical and email addresses at which the organization or individual 
may be contacted.
      */
+    @SuppressWarnings("serial")
     private Collection<Address> addresses;
 
     /**
      * On-line information that can be used to contact the individual or 
organization.
      */
+    @SuppressWarnings("serial")
     private Collection<OnlineResource> onlineResources;
 
     /**
      * Time period (including time zone) when individuals can contact the 
organization or individual.
      */
+    @SuppressWarnings("serial")
     private Collection<InternationalString> hoursOfService;
 
     /**
      * Supplemental instructions on how or when to contact the individual or 
organization.
      */
+    @SuppressWarnings("serial")
     private InternationalString contactInstructions;
 
     /**
      * Type of the contact.
      */
+    @SuppressWarnings("serial")
     private InternationalString contactType;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultIndividual.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultIndividual.java
index a38c9c3a34..a6d88d9ed4 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultIndividual.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultIndividual.java
@@ -56,6 +56,7 @@ public class DefaultIndividual extends AbstractParty 
implements Individual {
     /**
      * Position of the individual in an organization.
      */
+    @SuppressWarnings("serial")
     private InternationalString positionName;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultOnlineResource.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultOnlineResource.java
index 209038f9e4..5986f2abd4 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultOnlineResource.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultOnlineResource.java
@@ -89,11 +89,13 @@ public class DefaultOnlineResource extends ISOMetadata 
implements OnlineResource
     /**
      * Name of the online resources.
      */
+    @SuppressWarnings("serial")
     private InternationalString name;
 
     /**
      * Detailed text description of what the online resource is/does.
      */
+    @SuppressWarnings("serial")
     private InternationalString description;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultOrganisation.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultOrganisation.java
index c8f6569410..293f4c9f36 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultOrganisation.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultOrganisation.java
@@ -58,11 +58,13 @@ public class DefaultOrganisation extends AbstractParty 
implements Organisation {
     /**
      * Graphic identifying organization.
      */
+    @SuppressWarnings("serial")
     private Collection<BrowseGraphic> logo;
 
     /**
      * Individuals in the named organization.
      */
+    @SuppressWarnings("serial")
     private Collection<Individual> individual;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultResponsibility.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultResponsibility.java
index d680244cbf..d8a1b51ca7 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultResponsibility.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultResponsibility.java
@@ -83,11 +83,13 @@ public class DefaultResponsibility extends ISOMetadata 
implements Responsibility
     /**
      * Spatial or temporal extents of the role.
      */
+    @SuppressWarnings("serial")
     private Collection<Extent> extents;
 
     /**
      * Information about the parties.
      */
+    @SuppressWarnings("serial")
     private Collection<Party> parties;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultSeries.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultSeries.java
index 764d0257ee..32a5b22dab 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultSeries.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultSeries.java
@@ -58,16 +58,19 @@ public class DefaultSeries extends ISOMetadata implements 
Series {
     /**
      * Name of the series, or aggregate dataset, of which the dataset is a 
part.
      */
+    @SuppressWarnings("serial")
     private InternationalString name;
 
     /**
      * Information identifying the issue of the series.
      */
+    @SuppressWarnings("serial")
     private InternationalString issueIdentification;
 
     /**
      * Details on which pages of the publication the article was published.
      */
+    @SuppressWarnings("serial")
     private InternationalString page;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultTelephone.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultTelephone.java
index c1b369d201..1eb9f686b2 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultTelephone.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/citation/DefaultTelephone.java
@@ -222,6 +222,7 @@ public class DefaultTelephone extends ISOMetadata 
implements Telephone {
      * @deprecated This field will be removed after we removed the deprecated 
public methods.
      */
     @Deprecated
+    @SuppressWarnings("serial")
     private Collection<Telephone> owner;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/constraint/DefaultConstraints.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/constraint/DefaultConstraints.java
index 39b7e9c7cd..c6103f1897 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/constraint/DefaultConstraints.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/constraint/DefaultConstraints.java
@@ -82,31 +82,37 @@ public class DefaultConstraints extends ISOMetadata 
implements Constraints {
      * Limitation affecting the fitness for use of the resource.
      * Example: <cite>"not to be used for navigation"</cite>.
      */
+    @SuppressWarnings("serial")
     private Collection<InternationalString> useLimitations;
 
     /**
      * Spatial and / or temporal extent and or level of the application of the 
constraints restrictions.
      */
+    @SuppressWarnings("serial")
     private Scope constraintApplicationScope;
 
     /**
      * Graphic / symbol indicating the constraint.
      */
+    @SuppressWarnings("serial")
     private Collection<BrowseGraphic> graphics;
 
     /**
      * Citation for the limitation of constraint.
      */
+    @SuppressWarnings("serial")
     private Collection<Citation> references;
 
     /**
      * Information concerning the parties to whom the resource can or cannot 
be released.
      */
+    @SuppressWarnings("serial")
     private Releasability releasability;
 
     /**
      * Party responsible for the resource constraints.
      */
+    @SuppressWarnings("serial")
     private Collection<Responsibility> responsibleParties;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/constraint/DefaultLegalConstraints.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/constraint/DefaultLegalConstraints.java
index 331e70c488..cc869791b2 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/constraint/DefaultLegalConstraints.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/constraint/DefaultLegalConstraints.java
@@ -71,12 +71,14 @@ public class DefaultLegalConstraints extends 
DefaultConstraints implements Legal
      * Access constraints applied to assure the protection of privacy or 
intellectual property,
      * and any special restrictions or limitations on obtaining the resource.
      */
+    @SuppressWarnings("serial")
     private Collection<Restriction> accessConstraints;
 
     /**
      * Constraints applied to assure the protection of privacy or intellectual 
property,
      * and any special restrictions or limitations or warnings on using the 
resource.
      */
+    @SuppressWarnings("serial")
     private Collection<Restriction> useConstraints;
 
     /**
@@ -85,6 +87,7 @@ public class DefaultLegalConstraints extends 
DefaultConstraints implements Legal
      * or {@linkplain #getUseConstraints() use constraints} declares
      * {@linkplain Restriction#OTHER_RESTRICTIONS other restrictions}.
      */
+    @SuppressWarnings("serial")
     private Collection<InternationalString> otherConstraints;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/constraint/DefaultReleasability.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/constraint/DefaultReleasability.java
index e18747d1c8..a4ad2499dd 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/constraint/DefaultReleasability.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/constraint/DefaultReleasability.java
@@ -59,16 +59,19 @@ public class DefaultReleasability extends ISOMetadata 
implements Releasability {
     /**
      * Party to which the release statement applies.
      */
+    @SuppressWarnings("serial")
     private Collection<Responsibility> addressees;
 
     /**
      * Release statement.
      */
+    @SuppressWarnings("serial")
     private InternationalString statement;
 
     /**
      * Component in determining releasability.
      */
+    @SuppressWarnings("serial")
     private Collection<Restriction> disseminationConstraints;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/constraint/DefaultSecurityConstraints.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/constraint/DefaultSecurityConstraints.java
index 2f2a3a38de..1b7221a43b 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/constraint/DefaultSecurityConstraints.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/constraint/DefaultSecurityConstraints.java
@@ -69,16 +69,19 @@ public class DefaultSecurityConstraints extends 
DefaultConstraints implements Se
      * Explanation of the application of the legal constraints or other 
restrictions and legal
      * prerequisites for obtaining and using the resource.
      */
+    @SuppressWarnings("serial")
     private InternationalString userNote;
 
     /**
      * Name of the classification system.
      */
+    @SuppressWarnings("serial")
     private InternationalString classificationSystem;
 
     /**
      * Additional information about the restrictions on handling the resource.
      */
+    @SuppressWarnings("serial")
     private InternationalString handlingDescription;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultAttributeGroup.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultAttributeGroup.java
index 8e4def7d18..b805590d16 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultAttributeGroup.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultAttributeGroup.java
@@ -64,11 +64,13 @@ public class DefaultAttributeGroup extends ISOMetadata 
implements AttributeGroup
     /**
      * Type of information represented by the value(s).
      */
+    @SuppressWarnings("serial")
     private Collection<CoverageContentType> contentTypes;
 
     /**
      * Content type for attributes groups for a {@link RangeDimension}.
      */
+    @SuppressWarnings("serial")
     private Collection<RangeDimension> attributes;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultBand.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultBand.java
index c18c0b2a5a..6dfc6b2e8c 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultBand.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultBand.java
@@ -93,6 +93,7 @@ public class DefaultBand extends DefaultSampleDimension 
implements Band {
     /**
      * Units in which sensor wavelengths are expressed.
      */
+    @SuppressWarnings("serial")
     private Unit<Length> boundUnits;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultCoverageDescription.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultCoverageDescription.java
index 61abb0dcae..63c0e1c4d6 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultCoverageDescription.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultCoverageDescription.java
@@ -87,21 +87,25 @@ public class DefaultCoverageDescription extends 
AbstractContentInformation imple
     /**
      * Description of the attribute described by the measurement value.
      */
+    @SuppressWarnings("serial")
     private RecordType attributeDescription;
 
     /**
      * Identifier for the level of processing that has been applied to the 
resource.
      */
+    @SuppressWarnings("serial")
     private Identifier processingLevelCode;
 
     /**
      * Information on attribute groups of the resource.
      */
+    @SuppressWarnings("serial")
     private Collection<AttributeGroup> attributeGroups;
 
     /**
      * Provides the description of the specific range elements of a coverage.
      */
+    @SuppressWarnings("serial")
     private Collection<RangeElementDescription> rangeElementDescriptions;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultFeatureCatalogueDescription.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultFeatureCatalogueDescription.java
index 8535856278..c8d5e149d9 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultFeatureCatalogueDescription.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultFeatureCatalogueDescription.java
@@ -94,6 +94,7 @@ public class DefaultFeatureCatalogueDescription extends 
AbstractContentInformati
     /**
      * Language(s) and character set(s) used within the catalogue.
      */
+    @SuppressWarnings("serial")
     private Map<Locale,Charset> locales;
 
     /**
@@ -104,11 +105,13 @@ public class DefaultFeatureCatalogueDescription extends 
AbstractContentInformati
     /**
      * Subset of feature types from cited feature catalogue occurring in 
resource.
      */
+    @SuppressWarnings("serial")
     private Collection<FeatureTypeInfo> featureTypes;
 
     /**
      * Complete bibliographic reference to one or more external feature 
catalogues.
      */
+    @SuppressWarnings("serial")
     private Collection<Citation> featureCatalogueCitations;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultFeatureTypeInfo.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultFeatureTypeInfo.java
index b91babb211..847c575715 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultFeatureTypeInfo.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultFeatureTypeInfo.java
@@ -65,6 +65,7 @@ public class DefaultFeatureTypeInfo extends ISOMetadata 
implements FeatureTypeIn
     /**
      * Name of the feature type.
      */
+    @SuppressWarnings("serial")
     private GenericName featureTypeName;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultImageDescription.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultImageDescription.java
index 20b2d3086c..bfefa66d83 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultImageDescription.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultImageDescription.java
@@ -97,6 +97,7 @@ public class DefaultImageDescription extends 
DefaultCoverageDescription implemen
     /**
      * Specifies the image quality.
      */
+    @SuppressWarnings("serial")
     private Identifier imageQualityCode;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultRangeDimension.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultRangeDimension.java
index 34bbcd362d..53ea5c1b7b 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultRangeDimension.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultRangeDimension.java
@@ -74,17 +74,20 @@ public class DefaultRangeDimension extends ISOMetadata 
implements RangeDimension
     /**
      * Unique name or number that identifies attributes included in the 
coverage.
      */
+    @SuppressWarnings("serial")
     private MemberName sequenceIdentifier;
 
     /**
      * Description of the attribute.
      */
+    @SuppressWarnings("serial")
     private InternationalString description;
 
     /**
      * Identifiers for each attribute included in the resource. These 
identifiers
      * can be use to provide names for the attribute from a standard set of 
names.
      */
+    @SuppressWarnings("serial")
     private Collection<Identifier> names;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultRangeElementDescription.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultRangeElementDescription.java
index 93d832e895..924484c22a 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultRangeElementDescription.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultRangeElementDescription.java
@@ -67,16 +67,19 @@ public class DefaultRangeElementDescription extends 
ISOMetadata implements Range
     /**
      * Designation associated with a set of range elements.
      */
+    @SuppressWarnings("serial")
     private InternationalString name;
 
     /**
      * Description of a set of specific range elements.
      */
+    @SuppressWarnings("serial")
     private InternationalString definition;
 
     /**
      * Specific range elements, i.e. range elements associated with a name and 
their definition.
      */
+    @SuppressWarnings("serial")
     private Collection<Record> rangeElements;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultSampleDimension.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultSampleDimension.java
index e81b0de3a3..267266b56b 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultSampleDimension.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/content/DefaultSampleDimension.java
@@ -123,6 +123,7 @@ public class DefaultSampleDimension extends 
DefaultRangeDimension implements Sam
     /**
      * Units of data in each dimension included in the resource.
      */
+    @SuppressWarnings("serial")
     private Unit<?> units;
 
     /**
@@ -155,12 +156,14 @@ public class DefaultSampleDimension extends 
DefaultRangeDimension implements Sam
     /**
      * Type of other attribute description.
      */
+    @SuppressWarnings("serial")
     private RecordType otherPropertyType;
 
     /**
      * Instance of other/attributeType that defines attributes not explicitly
      * included in {@link CoverageContentType}.
      */
+    @SuppressWarnings("serial")
     private Record otherProperty;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultDataFile.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultDataFile.java
index 76df7e24b9..bde51026e1 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultDataFile.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultDataFile.java
@@ -84,6 +84,7 @@ public class DefaultDataFile extends ISOMetadata implements 
DataFile {
      *
      * @since 1.0
      */
+    @SuppressWarnings("serial")
     private InternationalString fileDescription;
 
     /**
@@ -99,6 +100,7 @@ public class DefaultDataFile extends ISOMetadata implements 
DataFile {
      * This attribute may be omitted when the dataset is composed of a single 
file and/or the
      * data does not relate to a feature catalogue.
      */
+    @SuppressWarnings("serial")
     private Collection<GenericName> featureTypes;
 
     /**
@@ -107,6 +109,7 @@ public class DefaultDataFile extends ISOMetadata implements 
DataFile {
      * @deprecated Removed in latest XSD schemas.
      */
     @Deprecated
+    @SuppressWarnings("serial")
     private Format fileFormat;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultDigitalTransferOptions.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultDigitalTransferOptions.java
index 28cfcbb428..2cc79fdbe7 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultDigitalTransferOptions.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultDigitalTransferOptions.java
@@ -76,6 +76,7 @@ public class DefaultDigitalTransferOptions extends 
ISOMetadata implements Digita
     /**
      * Tiles, layers, geographic areas, etc., in which data is available.
      */
+    @SuppressWarnings("serial")
     private InternationalString unitsOfDistribution;
 
     /**
@@ -87,21 +88,25 @@ public class DefaultDigitalTransferOptions extends 
ISOMetadata implements Digita
     /**
      * Information about online sources from which the resource can be 
obtained.
      */
+    @SuppressWarnings("serial")
     private Collection<OnlineResource> onLines;
 
     /**
      * Information about offline media on which the resource can be obtained.
      */
+    @SuppressWarnings("serial")
     private Collection<Medium> offLines;
 
     /**
      * Rate of occurrence of distribution.
      */
+    @SuppressWarnings("serial")
     private PeriodDuration transferFrequency;
 
     /**
      * Formats of distribution.
      */
+    @SuppressWarnings("serial")
     private Collection<Format> distributionFormats;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultDistribution.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultDistribution.java
index b57f0a7a0a..ff00b92b70 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultDistribution.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultDistribution.java
@@ -76,22 +76,26 @@ public class DefaultDistribution extends ISOMetadata 
implements Distribution {
     /**
      * Brief description of a set of distribution options.
      */
+    @SuppressWarnings("serial")
     private InternationalString description;
 
     /**
      * Provides a description of the format of the data to be distributed.
      */
+    @SuppressWarnings("serial")
     private Collection<Format> distributionFormats;
 
     /**
      * Provides information about the distributor.
      */
+    @SuppressWarnings("serial")
     private Collection<Distributor> distributors;
 
     /**
      * Provides information about technical means and media by which a 
resource is obtained
      * from the distributor.
      */
+    @SuppressWarnings("serial")
     private Collection<DigitalTransferOptions> transferOptions;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultDistributor.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultDistributor.java
index 60f1d00978..b1ca5cd13d 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultDistributor.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultDistributor.java
@@ -75,22 +75,26 @@ public class DefaultDistributor extends ISOMetadata 
implements Distributor {
     /**
      * Party from whom the resource may be obtained. This list need not be 
exhaustive.
      */
+    @SuppressWarnings("serial")
     private Responsibility distributorContact;
 
     /**
      * Provides information about how the resource may be obtained, and related
      * instructions and fee information.
      */
+    @SuppressWarnings("serial")
     private Collection<StandardOrderProcess> distributionOrderProcesses;
 
     /**
      * Provides information about the format used by the distributor.
      */
+    @SuppressWarnings("serial")
     private Collection<Format> distributorFormats;
 
     /**
      * Provides information about the technical means and media used by the 
distributor.
      */
+    @SuppressWarnings("serial")
     private Collection<DigitalTransferOptions> distributorTransferOptions;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultFormat.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultFormat.java
index b3480fe525..5cfe20c745 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultFormat.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultFormat.java
@@ -109,27 +109,32 @@ public class DefaultFormat extends ISOMetadata implements 
Format {
     /**
      * Citation / URL of the specification format.
      */
+    @SuppressWarnings("serial")
     private Citation formatSpecificationCitation;
 
     /**
      * Amendment number of the format version.
      */
+    @SuppressWarnings("serial")
     private InternationalString amendmentNumber;
 
     /**
      * Recommendations of algorithms or processes that can be applied to read 
or
      * expand resources to which compression techniques have been applied.
      */
+    @SuppressWarnings("serial")
     private InternationalString fileDecompressionTechnique;
 
     /**
      * Media used by the format.
      */
+    @SuppressWarnings("serial")
     private Collection<Medium> media;
 
     /**
      * Provides information about the distributor's format.
      */
+    @SuppressWarnings("serial")
     private Collection<Distributor> formatDistributors;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultMedium.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultMedium.java
index 4f10fc0d10..edcedacdc0 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultMedium.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultMedium.java
@@ -90,6 +90,7 @@ public class DefaultMedium extends ISOMetadata implements 
Medium {
     /**
      * Name of the medium on which the resource can be received.
      */
+    @SuppressWarnings("serial")
     private Citation name;
 
     /**
@@ -101,6 +102,7 @@ public class DefaultMedium extends ISOMetadata implements 
Medium {
     /**
      * Units of measure for the recording density.
      */
+    @SuppressWarnings("serial")
     private Unit<?> densityUnits;
 
     /**
@@ -111,11 +113,13 @@ public class DefaultMedium extends ISOMetadata implements 
Medium {
     /**
      * Methods used to write to the medium.
      */
+    @SuppressWarnings("serial")
     private Collection<MediumFormat> mediumFormats;
 
     /**
      * Description of other limitations or requirements for using the medium.
      */
+    @SuppressWarnings("serial")
     private InternationalString mediumNote;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultStandardOrderProcess.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultStandardOrderProcess.java
index be37b40b6e..6464f286fc 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultStandardOrderProcess.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/distribution/DefaultStandardOrderProcess.java
@@ -74,6 +74,7 @@ public class DefaultStandardOrderProcess extends ISOMetadata 
implements Standard
      * Fees and terms for retrieving the resource.
      * Include monetary units (as specified in ISO 4217).
      */
+    @SuppressWarnings("serial")
     private InternationalString fees;
 
     /**
@@ -90,21 +91,25 @@ public class DefaultStandardOrderProcess extends 
ISOMetadata implements Standard
     /**
      * General instructions, terms and services provided by the distributor.
      */
+    @SuppressWarnings("serial")
     private InternationalString orderingInstructions;
 
     /**
      * Typical turnaround time for the filling of an order.
      */
+    @SuppressWarnings("serial")
     private InternationalString turnaround;
 
     /**
      * Description of the order options record.
      */
+    @SuppressWarnings("serial")
     private RecordType orderOptionsType;
 
     /**
      * Request/purchase choices.
      */
+    @SuppressWarnings("serial")
     private Record orderOptions;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/extent/DefaultBoundingPolygon.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/extent/DefaultBoundingPolygon.java
index c9043da366..3dc7602e1b 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/extent/DefaultBoundingPolygon.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/extent/DefaultBoundingPolygon.java
@@ -62,6 +62,7 @@ public class DefaultBoundingPolygon extends 
AbstractGeographicExtent implements
     /**
      * The sets of points defining the bounding polygon.
      */
+    @SuppressWarnings("serial")
     private Collection<Geometry> polygons;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/extent/DefaultExtent.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/extent/DefaultExtent.java
index 78947a70fa..9a2f86c1e1 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/extent/DefaultExtent.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/extent/DefaultExtent.java
@@ -108,21 +108,25 @@ public class DefaultExtent extends ISOMetadata implements 
Extent {
     /**
      * The spatial and temporal extent for the referring object.
      */
+    @SuppressWarnings("serial")
     private InternationalString description;
 
     /**
      * Provides geographic component of the extent of the referring object.
      */
+    @SuppressWarnings("serial")
     private Collection<GeographicExtent> geographicElements;
 
     /**
      * Provides vertical component of the extent of the referring object.
      */
+    @SuppressWarnings("serial")
     private Collection<VerticalExtent> verticalElements;
 
     /**
      * Provides temporal component of the extent of the referring object.
      */
+    @SuppressWarnings("serial")
     private Collection<TemporalExtent> temporalElements;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/extent/DefaultGeographicDescription.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/extent/DefaultGeographicDescription.java
index 69c3892687..ae3f5e988b 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/extent/DefaultGeographicDescription.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/extent/DefaultGeographicDescription.java
@@ -73,6 +73,7 @@ public class DefaultGeographicDescription extends 
AbstractGeographicExtent imple
     /**
      * The identifier used to represent a geographic area.
      */
+    @SuppressWarnings("serial")
     private Identifier geographicIdentifier;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/extent/DefaultSpatialTemporalExtent.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/extent/DefaultSpatialTemporalExtent.java
index e0b8410b42..747266c1c9 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/extent/DefaultSpatialTemporalExtent.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/extent/DefaultSpatialTemporalExtent.java
@@ -69,11 +69,13 @@ public class DefaultSpatialTemporalExtent extends 
DefaultTemporalExtent implemen
      * The spatial extent component of composite
      * spatial and temporal extent.
      */
+    @SuppressWarnings("serial")
     private Collection<GeographicExtent> spatialExtent;
 
     /**
      * Vertical extent component.
      */
+    @SuppressWarnings("serial")
     private VerticalExtent verticalExtent;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/extent/DefaultTemporalExtent.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/extent/DefaultTemporalExtent.java
index ecec2e8ccf..3f7e0735eb 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/extent/DefaultTemporalExtent.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/extent/DefaultTemporalExtent.java
@@ -78,6 +78,7 @@ public class DefaultTemporalExtent extends ISOMetadata 
implements TemporalExtent
     /**
      * The date and time for the content of the dataset.
      */
+    @SuppressWarnings("serial")
     private TemporalPrimitive extent;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/extent/DefaultVerticalExtent.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/extent/DefaultVerticalExtent.java
index a2fe0f363c..4a91a69304 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/extent/DefaultVerticalExtent.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/extent/DefaultVerticalExtent.java
@@ -96,6 +96,7 @@ public class DefaultVerticalExtent extends ISOMetadata 
implements VerticalExtent
      * which the maximum and minimum elevation values are measured. The CRS
      * identification includes unit of measure.
      */
+    @SuppressWarnings("serial")
     private VerticalCRS verticalCRS;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/AbstractIdentification.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/AbstractIdentification.java
index 5937d16cff..f1ea99fb22 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/AbstractIdentification.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/AbstractIdentification.java
@@ -129,103 +129,123 @@ public class AbstractIdentification extends ISOMetadata 
implements Identificatio
     /**
      * Citation for the resource(s).
      */
+    @SuppressWarnings("serial")
     private Citation citation;
 
     /**
      * Brief narrative summary of the resource(s).
      */
+    @SuppressWarnings("serial")
     private InternationalString abstracts;
 
     /**
      * Summary of the intentions with which the resource(s) was developed.
      */
+    @SuppressWarnings("serial")
     private InternationalString purpose;
 
     /**
      * Recognition of those who contributed to the resource(s).
      */
+    @SuppressWarnings("serial")
     private Collection<InternationalString> credits;
 
     /**
      * Status of the resource(s).
      */
+    @SuppressWarnings("serial")
     private Collection<Progress> status;
 
     /**
      * Identification of, and means of communication with, person(s) and 
organizations(s)
      * associated with the resource(s).
      */
+    @SuppressWarnings("serial")
     private Collection<Responsibility> pointOfContacts;
 
     /**
      * Methods used to spatially represent geographic information.
      */
+    @SuppressWarnings("serial")
     private Collection<SpatialRepresentationType> spatialRepresentationTypes;
 
     /**
      * Factor which provides a general understanding of the density of spatial 
data in the resource(s).
      */
+    @SuppressWarnings("serial")
     private Collection<Resolution> spatialResolutions;
 
     /**
      * Smallest resolvable temporal period in a resource.
      */
+    @SuppressWarnings("serial")
     private Collection<Duration> temporalResolutions;
 
     /**
      * Main theme(s) of the resource.
      */
+    @SuppressWarnings("serial")
     private Collection<TopicCategory> topicCategories;
 
     /**
      * Spatial and temporal extent of the resource.
      */
+    @SuppressWarnings("serial")
     private Collection<Extent> extents;
 
     /**
      * Other documentation associated with the resource.
      */
+    @SuppressWarnings("serial")
     private Collection<Citation> additionalDocumentations;
 
     /**
      * Code that identifies the level of processing in the producers coding 
system of a resource.
      */
+    @SuppressWarnings("serial")
     private Identifier processingLevel;
 
     /**
      * Provides information about the frequency of resource updates, and the 
scope of those updates.
      */
+    @SuppressWarnings("serial")
     private Collection<MaintenanceInformation> resourceMaintenances;
 
     /**
      * Provides a graphic that illustrates the resource(s) (should include a 
legend for the graphic).
      */
+    @SuppressWarnings("serial")
     private Collection<BrowseGraphic> graphicOverviews;
 
     /**
      * Provides a description of the format of the resource(s).
      */
+    @SuppressWarnings("serial")
     private Collection<Format> resourceFormats;
 
     /**
      * Provides category keywords, their type, and reference source.
      */
+    @SuppressWarnings("serial")
     private Collection<Keywords> descriptiveKeywords;
 
     /**
      * Provides basic information about specific application(s) for which the 
resource(s)
      * has/have been or is being used by different users.
      */
+    @SuppressWarnings("serial")
     private Collection<Usage> resourceSpecificUsages;
 
     /**
      * Provides information about constraints which apply to the resource(s).
      */
+    @SuppressWarnings("serial")
     private Collection<Constraints> resourceConstraints;
 
     /**
      * Provides aggregate dataset information.
      */
+    @SuppressWarnings("serial")
     private Collection<AssociatedResource> associatedResources;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultAssociatedResource.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultAssociatedResource.java
index e04559503d..dd65ec4401 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultAssociatedResource.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultAssociatedResource.java
@@ -77,6 +77,7 @@ public class DefaultAssociatedResource extends ISOMetadata 
implements Associated
     /**
      * Citation information about the associated resource.
      */
+    @SuppressWarnings("serial")
     private Citation name;
 
     /**
@@ -92,6 +93,7 @@ public class DefaultAssociatedResource extends ISOMetadata 
implements Associated
     /**
      * Reference to the metadata of the associated resource.
      */
+    @SuppressWarnings("serial")
     private Citation metadataReference;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultBrowseGraphic.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultBrowseGraphic.java
index 55c278454f..348b9ffb9e 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultBrowseGraphic.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultBrowseGraphic.java
@@ -79,6 +79,7 @@ public class DefaultBrowseGraphic extends ISOMetadata 
implements BrowseGraphic {
     /**
      * Text description of the illustration.
      */
+    @SuppressWarnings("serial")
     private InternationalString fileDescription;
 
     /**
@@ -90,11 +91,13 @@ public class DefaultBrowseGraphic extends ISOMetadata 
implements BrowseGraphic {
     /**
      * Restrictions on access and/or of browse graphic.
      */
+    @SuppressWarnings("serial")
     private Collection<Constraints> imageConstraints;
 
     /**
      * Links to browse graphic.
      */
+    @SuppressWarnings("serial")
     private Collection<OnlineResource> linkages;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultCoupledResource.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultCoupledResource.java
index bda39dc3e1..309dc69d2e 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultCoupledResource.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultCoupledResource.java
@@ -75,21 +75,25 @@ public class DefaultCoupledResource extends ISOMetadata 
implements CoupledResour
     /**
      * Scoped identifier of the resource in the context of the given service 
instance.
      */
+    @SuppressWarnings("serial")
     private ScopedName scopedName;
 
     /**
      * References to the resource on which the services operates.
      */
+    @SuppressWarnings("serial")
     private Collection<Citation> resourceReferences;
 
     /**
      * The tightly coupled resources.
      */
+    @SuppressWarnings("serial")
     private Collection<DataIdentification> resources;
 
     /**
      * The service operation.
      */
+    @SuppressWarnings("serial")
     private OperationMetadata operation;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultDataIdentification.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultDataIdentification.java
index 118fa33a03..c21d6ffc27 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultDataIdentification.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultDataIdentification.java
@@ -99,17 +99,20 @@ public class DefaultDataIdentification extends 
AbstractIdentification implements
     /**
      * Language(s) and character set(s) used within the dataset.
      */
+    @SuppressWarnings("serial")
     private Map<Locale,Charset> locales;
 
     /**
      * Description of the dataset in the producer’s processing environment, 
including items
      * such as the software, the computer operating system, file name, and the 
dataset size
      */
+    @SuppressWarnings("serial")
     private InternationalString environmentDescription;
 
     /**
      * Any other descriptive information about the dataset.
      */
+    @SuppressWarnings("serial")
     private InternationalString supplementalInformation;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultKeywordClass.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultKeywordClass.java
index ae8f1bc107..9a89e0682c 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultKeywordClass.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultKeywordClass.java
@@ -69,6 +69,7 @@ public class DefaultKeywordClass extends ISOMetadata 
implements KeywordClass {
     /**
      * A character string to label the keyword category in natural language.
      */
+    @SuppressWarnings("serial")
     private InternationalString className;
 
     /**
@@ -79,13 +80,13 @@ public class DefaultKeywordClass extends ISOMetadata 
implements KeywordClass {
     /**
      * Reference that binds the keyword class to a formal conceptualization of 
a knowledge domain.
      */
+    @SuppressWarnings("serial")
     private Citation ontology;
 
     /**
      * Constructs an initially empty keyword class.
      */
     public DefaultKeywordClass() {
-        super();
     }
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultKeywords.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultKeywords.java
index 1d91bb6f96..a71c14cced 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultKeywords.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultKeywords.java
@@ -71,6 +71,7 @@ public class DefaultKeywords extends ISOMetadata implements 
Keywords {
     /**
      * Commonly used word(s) or formalised word(s) or phrase(s) used to 
describe the subject.
      */
+    @SuppressWarnings("serial")
     private Collection<InternationalString> keywords;
 
     /**
@@ -81,19 +82,20 @@ public class DefaultKeywords extends ISOMetadata implements 
Keywords {
     /**
      * Name of the formally registered thesaurus or a similar authoritative 
source of keywords.
      */
+    @SuppressWarnings("serial")
     private Citation thesaurusName;
 
     /**
      * User-defined categorization of groups of keywords that extend or are 
orthogonal
      * to the standardized {@linkplain #getType() keyword type} codes.
      */
+    @SuppressWarnings("serial")
     private KeywordClass keywordClass;
 
     /**
      * Constructs an initially empty keywords.
      */
     public DefaultKeywords() {
-        super();
     }
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultOperationChainMetadata.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultOperationChainMetadata.java
index d36a6f6800..f5571256c5 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultOperationChainMetadata.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultOperationChainMetadata.java
@@ -72,16 +72,19 @@ public class DefaultOperationChainMetadata extends 
ISOMetadata implements Operat
     /**
      * The name as used by the service for this chain.
      */
+    @SuppressWarnings("serial")
     private InternationalString name;
 
     /**
      * A narrative explanation of the services in the chain and resulting 
output.
      */
+    @SuppressWarnings("serial")
     private InternationalString description;
 
     /**
      * Information about the operations applied by the chain.
      */
+    @SuppressWarnings("serial")
     private List<OperationMetadata> operations;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultOperationMetadata.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultOperationMetadata.java
index 36b7fc1778..4aebb7f7fe 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultOperationMetadata.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultOperationMetadata.java
@@ -82,31 +82,37 @@ public class DefaultOperationMetadata extends ISOMetadata 
implements OperationMe
     /**
      * Distributed computing platforms on which the operation has been 
implemented.
      */
+    @SuppressWarnings("serial")
     private Collection<DistributedComputingPlatform> 
distributedComputingPlatforms;
 
     /**
      * Free text description of the intent of the operation and the results of 
the operation.
      */
+    @SuppressWarnings("serial")
     private InternationalString operationDescription;
 
     /**
      * The name used to invoke this interface within the context of the DCP.
      */
+    @SuppressWarnings("serial")
     private InternationalString invocationName;
 
     /**
      * Handle for accessing the service interface.
      */
+    @SuppressWarnings("serial")
     private Collection<OnlineResource> connectPoints;
 
     /**
      * The parameters that are required for this interface.
      */
+    @SuppressWarnings("serial")
     private Collection<ParameterDescriptor<?>> parameters;
 
     /**
      * List of operation that must be completed immediately.
      */
+    @SuppressWarnings("serial")
     private List<OperationMetadata> dependsOn;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultRepresentativeFraction.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultRepresentativeFraction.java
index 9e069dc56c..26a4332c3e 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultRepresentativeFraction.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultRepresentativeFraction.java
@@ -95,6 +95,7 @@ public class DefaultRepresentativeFraction extends Number 
implements Representat
      * All identifiers associated with this metadata, or {@code null} if none.
      * This field is initialized to a non-null value when first needed.
      */
+    @SuppressWarnings("serial")
     private Collection<Identifier> identifiers;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultResolution.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultResolution.java
index 64e55b0e10..7e44563483 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultResolution.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultResolution.java
@@ -118,6 +118,7 @@ public class DefaultResolution extends ISOMetadata 
implements Resolution {
      * Either the scale as a {@link RepresentativeFraction} instance, the 
distance, the angle,
      * or the level of details as an {@link InternationalString} instance.
      */
+    @SuppressWarnings("serial")         // Not statically typed as 
Serializable.
     private Object value;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultServiceIdentification.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultServiceIdentification.java
index 288cc98ff1..e3554607a0 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultServiceIdentification.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultServiceIdentification.java
@@ -96,16 +96,19 @@ public class DefaultServiceIdentification extends 
AbstractIdentification impleme
     /**
      * A service type name.
      */
+    @SuppressWarnings("serial")
     private GenericName serviceType;
 
     /**
      * The version of the service, supports searching based on the version of 
serviceType.
      */
+    @SuppressWarnings("serial")
     private Collection<String> serviceTypeVersions;
 
     /**
      * Information about the availability of the service.
      */
+    @SuppressWarnings("serial")
     private StandardOrderProcess accessProperties;
 
     /**
@@ -116,36 +119,43 @@ public class DefaultServiceIdentification extends 
AbstractIdentification impleme
     /**
      * Further description of the data coupling in the case of tightly coupled 
services.
      */
+    @SuppressWarnings("serial")
     private Collection<CoupledResource> coupledResources;
 
     /**
      * References to the resource on which the service operates.
      */
+    @SuppressWarnings("serial")
     private Collection<Citation> operatedDatasets;
 
     /**
      * Profiles to which the service adheres.
      */
+    @SuppressWarnings("serial")
     private Collection<Citation> profiles;
 
     /**
      * Standards to which the service adheres.
      */
+    @SuppressWarnings("serial")
     private Collection<Citation> serviceStandards;
 
     /**
      * Information about the operations that comprise the service.
      */
+    @SuppressWarnings("serial")
     private Collection<OperationMetadata> containsOperations;
 
     /**
      * Information on the resources that the service operates on.
      */
+    @SuppressWarnings("serial")
     private Collection<DataIdentification> operatesOn;
 
     /**
      * Information about the chain applied by the service.
      */
+    @SuppressWarnings("serial")
     private Collection<OperationChainMetadata> containsChain;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultUsage.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultUsage.java
index 6a33e8fa87..3b8c1c19c0 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultUsage.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/identification/DefaultUsage.java
@@ -84,6 +84,7 @@ public class DefaultUsage extends ISOMetadata implements 
Usage {
     /**
      * Brief description of the resource and/or resource series usage.
      */
+    @SuppressWarnings("serial")
     private InternationalString specificUsage;
 
     /**
@@ -97,27 +98,32 @@ public class DefaultUsage extends ISOMetadata implements 
Usage {
      * Applications, determined by the user for which the resource and/or 
resource series
      * is not suitable.
      */
+    @SuppressWarnings("serial")
     private InternationalString userDeterminedLimitations;
 
     /**
      * Identification of and means of communicating with person(s) and 
organization(s) using the resource(s).
      */
+    @SuppressWarnings("serial")
     private Collection<Responsibility> userContactInfo;
 
     /**
      * Responses to the user-determined limitations.
      */
+    @SuppressWarnings("serial")
     private Collection<InternationalString> responses;
 
     /**
      * Publication that describe usage of data.
      */
+    @SuppressWarnings("serial")
     private Collection<Citation> additionalDocumentation;
 
     /**
      * Citation of a description of known issues associated with the resource
      * along with proposed solutions if available.
      */
+    @SuppressWarnings("serial")
     private Collection<Citation> identifiedIssues;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/lineage/DefaultAlgorithm.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/lineage/DefaultAlgorithm.java
index d281ef50f0..3b6b17050f 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/lineage/DefaultAlgorithm.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/lineage/DefaultAlgorithm.java
@@ -65,11 +65,13 @@ public class DefaultAlgorithm extends ISOMetadata 
implements Algorithm {
     /**
      * Information identifying the algorithm and version or date.
      */
+    @SuppressWarnings("serial")
     private Citation citation;
 
     /**
      * Information describing the algorithm used to generate the data.
      */
+    @SuppressWarnings("serial")
     private InternationalString description;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/lineage/DefaultLineage.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/lineage/DefaultLineage.java
index 490471ef0f..28da2c1a20 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/lineage/DefaultLineage.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/lineage/DefaultLineage.java
@@ -96,27 +96,32 @@ public class DefaultLineage extends ISOMetadata implements 
Lineage {
      * Should be provided only if {@linkplain DefaultScope#getLevel scope 
level} is
      * {@linkplain ScopeCode#DATASET dataset} or {@linkplain ScopeCode#SERIES 
series}.
      */
+    @SuppressWarnings("serial")
     private InternationalString statement;
 
     /**
      * Type of resource and / or extent to which the lineage information 
applies.
      */
+    @SuppressWarnings("serial")
     private Scope scope;
 
     /**
      * A resources (for example publication) that describes the whole
      * process to generate this resource (for example a dataset).
      */
+    @SuppressWarnings("serial")
     private Collection<Citation> additionalDocumentation;
 
     /**
      * Information about an event in the creation process for the data 
specified by the scope.
      */
+    @SuppressWarnings("serial")
     private Collection<ProcessStep> processSteps;
 
     /**
      * Information about the source data used in creating the data specified 
by the scope.
      */
+    @SuppressWarnings("serial")
     private Collection<Source> sources;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/lineage/DefaultProcessStep.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/lineage/DefaultProcessStep.java
index 22ee8f8828..1fe19632a0 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/lineage/DefaultProcessStep.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/lineage/DefaultProcessStep.java
@@ -93,42 +93,50 @@ public class DefaultProcessStep extends ISOMetadata 
implements ProcessStep {
     /**
      * Description of the event, including related parameters or tolerances.
      */
+    @SuppressWarnings("serial")
     private InternationalString description;
 
     /**
      * Requirement or purpose for the process step.
      */
+    @SuppressWarnings("serial")
     private InternationalString rationale;
 
     /**
      * Date, time or range of date and time over which the process step 
occurred.
      */
+    @SuppressWarnings("serial")
     private TemporalPrimitive stepDateTime;
 
     /**
      * Identification of, and means of communication with, person(s) and
      * organization(s) associated with the process step.
      */
+    @SuppressWarnings("serial")
     private Collection<Responsibility> processors;
 
     /**
      * Process step documentation.
      */
+    @SuppressWarnings("serial")
     private Collection<Citation> references;
 
     /**
      * Type of resource and / or extent to which the process step applies.
      */
+    @SuppressWarnings("serial")
     private Scope scope;
 
     /**
      * Information about the source data used in creating the data specified 
by the scope.
      */
+    @SuppressWarnings("serial")
     private Collection<Source> sources;
 
     /**
      * Description of the product generated as a result of the process step.
      */
+    @SuppressWarnings("serial")
     private Collection<Source> outputs;
 
     /**
@@ -136,11 +144,13 @@ public class DefaultProcessStep extends ISOMetadata 
implements ProcessStep {
      * to derive geographic data from the raw instrument measurements, such as 
datasets,
      * software used, and the processing environment.
      */
+    @SuppressWarnings("serial")
     private Processing processingInformation;
 
     /**
      * Report generated by the process step.
      */
+    @SuppressWarnings("serial")
     private Collection<ProcessStepReport> reports;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/lineage/DefaultProcessStepReport.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/lineage/DefaultProcessStepReport.java
index 972997cd1c..3160e0d46c 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/lineage/DefaultProcessStepReport.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/lineage/DefaultProcessStepReport.java
@@ -64,16 +64,19 @@ public class DefaultProcessStepReport extends ISOMetadata 
implements ProcessStep
     /**
      * Name of the processing report.
      */
+    @SuppressWarnings("serial")
     private InternationalString name;
 
     /**
      * Textual description of what occurred during the process step.
      */
+    @SuppressWarnings("serial")
     private InternationalString description;
 
     /**
      * Type of file that contains the processing report.
      */
+    @SuppressWarnings("serial")
     private InternationalString fileType;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/lineage/DefaultProcessing.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/lineage/DefaultProcessing.java
index f036bc397b..7a8220f39f 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/lineage/DefaultProcessing.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/lineage/DefaultProcessing.java
@@ -70,27 +70,32 @@ public class DefaultProcessing extends ISOMetadata 
implements Processing {
     /**
      * Reference to document describing processing software.
      */
+    @SuppressWarnings("serial")
     private Collection<Citation> softwareReferences;
 
     /**
      * Additional details about the processing procedures.
      */
+    @SuppressWarnings("serial")
     private InternationalString procedureDescription;
 
     /**
      * Reference to documentation describing the processing.
      */
+    @SuppressWarnings("serial")
     private Collection<Citation> documentations;
 
     /**
      * Parameters to control the processing operations, entered at run time.
      */
+    @SuppressWarnings("serial")
     private InternationalString runTimeParameters;
 
     /**
      * Details of the methodology by which geographic information was derived 
from the
      * instrument readings.
      */
+    @SuppressWarnings("serial")
     private Collection<Algorithm> algorithms;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/lineage/DefaultSource.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/lineage/DefaultSource.java
index 092242fc3d..ccdb3ac9e2 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/lineage/DefaultSource.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/lineage/DefaultSource.java
@@ -110,46 +110,55 @@ public class DefaultSource extends ISOMetadata implements 
Source {
     /**
      * Detailed description of the level of the source data.
      */
+    @SuppressWarnings("serial")
     private InternationalString description;
 
     /**
      * Spatial resolution expressed as a scale factor, an angle or a level of 
detail.
      */
+    @SuppressWarnings("serial")
     private Resolution sourceSpatialResolution;
 
     /**
      * Spatial reference system used by the source data.
      */
+    @SuppressWarnings("serial")
     private ReferenceSystem sourceReferenceSystem;
 
     /**
      * Recommended reference to be used for the source data.
      */
+    @SuppressWarnings("serial")
     private Citation sourceCitation;
 
     /**
      * Reference to metadata for the source.
      */
+    @SuppressWarnings("serial")
     private Collection<Citation> sourceMetadata;
 
     /**
      * Type and / or extent of the source.
      */
+    @SuppressWarnings("serial")
     private Scope scope;
 
     /**
      * Information about an event in the creation process for the source data.
      */
+    @SuppressWarnings("serial")
     private Collection<ProcessStep> sourceSteps;
 
     /**
      * Processing level of the source data.
      */
+    @SuppressWarnings("serial")
     private Identifier processedLevel;
 
     /**
      * Distance between consistent parts (centre, left side, right side) of 
two adjacent pixels.
      */
+    @SuppressWarnings("serial")
     private NominalResolution resolution;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/maintenance/DefaultMaintenanceInformation.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/maintenance/DefaultMaintenanceInformation.java
index ddba30f825..b0d7b23246 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/maintenance/DefaultMaintenanceInformation.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/maintenance/DefaultMaintenanceInformation.java
@@ -97,27 +97,32 @@ public class DefaultMaintenanceInformation extends 
ISOMetadata implements Mainte
     /**
      * Date information associated with maintenance of resource.
      */
+    @SuppressWarnings("serial")
     private Collection<CitationDate> maintenanceDates;
 
     /**
      * Maintenance period other than those defined, in milliseconds.
      */
+    @SuppressWarnings("serial")
     private PeriodDuration userDefinedMaintenanceFrequency;
 
     /**
      * Type of resource and / or extent to which the maintenance information 
applies.
      */
+    @SuppressWarnings("serial")
     private Collection<Scope> maintenanceScopes;
 
     /**
      * Information regarding specific requirements for maintaining the 
resource.
      */
+    @SuppressWarnings("serial")
     private Collection<InternationalString> maintenanceNotes;
 
     /**
      * Identification of, and means of communicating with, person(s) and 
organization(s)
      * with responsibility for maintaining the resource.
      */
+    @SuppressWarnings("serial")
     private Collection<Responsibility> contacts;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/maintenance/DefaultScope.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/maintenance/DefaultScope.java
index 753740e5f6..c8f0227324 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/maintenance/DefaultScope.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/maintenance/DefaultScope.java
@@ -79,11 +79,13 @@ public class DefaultScope extends ISOMetadata implements 
Scope {
     /**
      * Information about the spatial, vertical and temporal extent of the 
resource specified by the scope.
      */
+    @SuppressWarnings("serial")
     private Collection<Extent> extents;
 
     /**
      * Detailed description about the level of the data specified by the scope.
      */
+    @SuppressWarnings("serial")
     private Collection<ScopeDescription> levelDescription;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/maintenance/DefaultScopeDescription.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/maintenance/DefaultScopeDescription.java
index e78783d8e9..6db85e1506 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/maintenance/DefaultScopeDescription.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/maintenance/DefaultScopeDescription.java
@@ -125,6 +125,7 @@ public class DefaultScopeDescription extends ISOMetadata 
implements ScopeDescrip
      *   <li>{@code InternationalString} for the {@code other} property</li>
      * </ul>
      */
+    @SuppressWarnings("serial")         // Not statically typed as 
Serializable.
     private Object value;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/quality/AbstractElement.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/quality/AbstractElement.java
index 8902b1c39a..447265b775 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/quality/AbstractElement.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/quality/AbstractElement.java
@@ -99,31 +99,37 @@ public class AbstractElement extends ISOMetadata implements 
Element {
     /**
      * Name of the test applied to the data.
      */
+    @SuppressWarnings("serial")
     private Collection<InternationalString> namesOfMeasure;
 
     /**
      * Code identifying a registered standard procedure, or {@code null} if 
none.
      */
+    @SuppressWarnings("serial")
     private Identifier measureIdentification;
 
     /**
      * Description of the measure being determined.
      */
+    @SuppressWarnings("serial")
     private InternationalString measureDescription;
 
     /**
      * Type of method used to evaluate quality of the dataset, or {@code null} 
if unspecified.
      */
+    @SuppressWarnings("serial")
     private EvaluationMethodType evaluationMethodType;
 
     /**
      * Description of the evaluation method.
      */
+    @SuppressWarnings("serial")
     private InternationalString evaluationMethodDescription;
 
     /**
      * Reference to the procedure information, or {@code null} if none.
      */
+    @SuppressWarnings("serial")
     private Citation evaluationProcedure;
 
     /**
@@ -299,6 +305,7 @@ public class AbstractElement extends ISOMetadata implements 
Element {
      * come of evaluating the obtained value (or set of values) against a 
specified
      * acceptable conformance quality level.
      */
+    @SuppressWarnings("serial")
     private Collection<Result> results;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/quality/DefaultConformanceResult.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/quality/DefaultConformanceResult.java
index 0c22c9bd5b..8dce57bca1 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/quality/DefaultConformanceResult.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/quality/DefaultConformanceResult.java
@@ -68,11 +68,13 @@ public class DefaultConformanceResult extends 
AbstractResult implements Conforma
     /**
      * Citation of product specification or user requirement against which 
data is being evaluated.
      */
+    @SuppressWarnings("serial")
     private Citation specification;
 
     /**
      * Explanation of the meaning of conformance for this result.
      */
+    @SuppressWarnings("serial")
     private InternationalString explanation;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/quality/DefaultCoverageResult.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/quality/DefaultCoverageResult.java
index a09901dd5b..c5ff4a8eda 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/quality/DefaultCoverageResult.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/quality/DefaultCoverageResult.java
@@ -80,22 +80,26 @@ public class DefaultCoverageResult extends AbstractResult 
implements CoverageRes
     /**
      * Provides the digital representation of data quality measures composing 
the coverage result.
      */
+    @SuppressWarnings("serial")
     private SpatialRepresentation resultSpatialRepresentation;
 
     /**
      * Provides the description of the content of the result coverage, i.e. 
semantic definition
      * of the data quality measures.
      */
+    @SuppressWarnings("serial")
     private CoverageDescription resultContentDescription;
 
     /**
      * Provides information about the format of the result coverage data.
      */
+    @SuppressWarnings("serial")
     private Format resultFormat;
 
     /**
      * Provides information about the data file containing the result coverage 
data.
      */
+    @SuppressWarnings("serial")
     private DataFile resultFile;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/quality/DefaultDataQuality.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/quality/DefaultDataQuality.java
index da2e79af99..40ad04e689 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/quality/DefaultDataQuality.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/quality/DefaultDataQuality.java
@@ -73,6 +73,7 @@ public class DefaultDataQuality extends ISOMetadata 
implements DataQuality {
     /**
      * The specific data to which the data quality information applies.
      */
+    @SuppressWarnings("serial")
     private Scope scope;
 
     /**
@@ -80,6 +81,7 @@ public class DefaultDataQuality extends ISOMetadata 
implements DataQuality {
      * Should be provided only if {@linkplain Scope#getLevel scope level} is
      * {@linkplain org.opengis.metadata.maintenance.ScopeCode#DATASET dataset}.
      */
+    @SuppressWarnings("serial")
     private Collection<Element> reports;
 
     /**
@@ -87,6 +89,7 @@ public class DefaultDataQuality extends ISOMetadata 
implements DataQuality {
      * Should be provided only if {@linkplain Scope#getLevel scope level} is
      * {@linkplain org.opengis.metadata.maintenance.ScopeCode#DATASET dataset}.
      */
+    @SuppressWarnings("serial")
     private Lineage lineage;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/quality/DefaultQuantitativeResult.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/quality/DefaultQuantitativeResult.java
index fdd0a00312..7e66020722 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/quality/DefaultQuantitativeResult.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/quality/DefaultQuantitativeResult.java
@@ -69,21 +69,25 @@ public class DefaultQuantitativeResult extends 
AbstractResult implements Quantit
     /**
      * Quantitative value or values, content determined by the evaluation 
procedure used.
      */
+    @SuppressWarnings("serial")
     private List<Record> values;
 
     /**
      * Value type for reporting a data quality result, or {@code null} if none.
      */
+    @SuppressWarnings("serial")
     private RecordType valueType;
 
     /**
      * Value unit for reporting a data quality result, or {@code null} if none.
      */
+    @SuppressWarnings("serial")
     private Unit<?> valueUnit;
 
     /**
      * Statistical method used to determine the value, or {@code null} if none.
      */
+    @SuppressWarnings("serial")
     private InternationalString errorStatistic;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/AbstractGeolocationInformation.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/AbstractGeolocationInformation.java
index 33fd37ce80..2629483944 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/AbstractGeolocationInformation.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/AbstractGeolocationInformation.java
@@ -58,6 +58,7 @@ public class AbstractGeolocationInformation extends 
ISOMetadata implements Geolo
     /**
      * Provides an overall assessment of quality of geolocation information.
      */
+    @SuppressWarnings("serial")
     private Collection<DataQuality> qualityInfo;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultDimension.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultDimension.java
index c44b3515e4..89683a91d5 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultDimension.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultDimension.java
@@ -94,11 +94,13 @@ public class DefaultDimension extends ISOMetadata 
implements Dimension {
      * Example: dimensionName = "column",
      *          dimensionTitle = "longitude"
      */
+    @SuppressWarnings("serial")
     private InternationalString dimensionTitle;
 
     /**
      * Description of the axis.
      */
+    @SuppressWarnings("serial")
     private InternationalString dimensionDescription;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultGCP.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultGCP.java
index 79615d6ae1..5bad9f9869 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultGCP.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultGCP.java
@@ -67,11 +67,13 @@ public class DefaultGCP extends ISOMetadata implements GCP {
     /**
      * Geographic or map position of the control point, in either two or three 
dimensions.
      */
+    @SuppressWarnings("serial")
     private DirectPosition geographicCoordinates;
 
     /**
      * Accuracy of a ground control point.
      */
+    @SuppressWarnings("serial")
     private Collection<Element> accuracyReports;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultGCPCollection.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultGCPCollection.java
index f7ca4cf46b..baa80f5d3d 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultGCPCollection.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultGCPCollection.java
@@ -78,16 +78,19 @@ public class DefaultGCPCollection extends 
AbstractGeolocationInformation impleme
     /**
      * Name of the GCP collection.
      */
+    @SuppressWarnings("serial")
     private InternationalString collectionName;
 
     /**
      * Coordinate system in which the ground control points are defined.
      */
+    @SuppressWarnings("serial")
     private ReferenceSystem coordinateReferenceSystem;
 
     /**
      * Ground control point(s) used in the collection.
      */
+    @SuppressWarnings("serial")
     private Collection<GCP> GCPs;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultGeorectified.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultGeorectified.java
index ff09f098c8..678e25a72c 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultGeorectified.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultGeorectified.java
@@ -100,6 +100,7 @@ public class DefaultGeorectified extends 
DefaultGridSpatialRepresentation implem
      * Description of geographic position points used to test the accuracy of 
the
      * georeferenced grid data.
      */
+    @SuppressWarnings("serial")
     private InternationalString checkPointDescription;
 
     /**
@@ -108,6 +109,7 @@ public class DefaultGeorectified extends 
DefaultGridSpatialRepresentation implem
      * diagonals in the grid spatial dimensions. There are four corner points 
in a
      * georectified grid; at least two corner points along one diagonal are 
required.
      */
+    @SuppressWarnings("serial")
     private List<Point> cornerPoints;
 
     /**
@@ -115,6 +117,7 @@ public class DefaultGeorectified extends 
DefaultGridSpatialRepresentation implem
      * and the grid coordinate of the cell halfway between opposite ends of 
the grid in the
      * spatial dimensions.
      */
+    @SuppressWarnings("serial")
     private Point centrePoint;
 
     /**
@@ -125,16 +128,19 @@ public class DefaultGeorectified extends 
DefaultGridSpatialRepresentation implem
     /**
      * Description of the information about which grid dimensions are the 
spatial dimensions.
      */
+    @SuppressWarnings("serial")
     private InternationalString transformationDimensionDescription;
 
     /**
      * Information about which grid dimensions are the spatial dimensions.
      */
+    @SuppressWarnings("serial")
     private Collection<InternationalString> transformationDimensionMapping;
 
     /**
      * Geographic references used to validate georectification of the data.
      */
+    @SuppressWarnings("serial")
     private Collection<GCP> checkPoints;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultGeoreferenceable.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultGeoreferenceable.java
index f2e2f78b68..6904a4b8c7 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultGeoreferenceable.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultGeoreferenceable.java
@@ -97,21 +97,25 @@ public class DefaultGeoreferenceable extends 
DefaultGridSpatialRepresentation im
     /**
      * Description of parameters used to describe sensor orientation.
      */
+    @SuppressWarnings("serial")
     private InternationalString orientationParameterDescription;
 
     /**
      * Terms which support grid data georeferencing.
      */
+    @SuppressWarnings("serial")
     private Record georeferencedParameters;
 
     /**
      * Reference providing description of the parameters.
      */
+    @SuppressWarnings("serial")
     private Collection<Citation> parameterCitations;
 
     /**
      * Information that can be used to geolocate the data.
      */
+    @SuppressWarnings("serial")
     private Collection<GeolocationInformation> geolocationInformation;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultGridSpatialRepresentation.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultGridSpatialRepresentation.java
index 7c5a6b1a92..818eff6437 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultGridSpatialRepresentation.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultGridSpatialRepresentation.java
@@ -96,6 +96,7 @@ public class DefaultGridSpatialRepresentation extends 
AbstractSpatialRepresentat
     /**
      * Information about spatial-temporal axis properties.
      */
+    @SuppressWarnings("serial")
     private List<Dimension> axisDimensionProperties;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultVectorSpatialRepresentation.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultVectorSpatialRepresentation.java
index c4b4021790..290d92e89d 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultVectorSpatialRepresentation.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/metadata/iso/spatial/DefaultVectorSpatialRepresentation.java
@@ -65,6 +65,7 @@ public class DefaultVectorSpatialRepresentation extends 
AbstractSpatialRepresent
     /**
      * Information about the geometric objects used in the dataset.
      */
+    @SuppressWarnings("serial")
     private Collection<GeometricObjects> geometricObjects;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/util/iso/AbstractName.java 
b/core/sis-metadata/src/main/java/org/apache/sis/util/iso/AbstractName.java
index 26b31ae973..633a00f196 100644
--- a/core/sis-metadata/src/main/java/org/apache/sis/util/iso/AbstractName.java
+++ b/core/sis-metadata/src/main/java/org/apache/sis/util/iso/AbstractName.java
@@ -356,6 +356,7 @@ public abstract class AbstractName implements GenericName, 
Serializable {
          * The sequence of {@linkplain DefaultLocalName local names} making 
this generic name.
          * This is the value returned by {@link AbstractName#getParsedNames()}.
          */
+        @SuppressWarnings("serial")
         private final List<? extends LocalName> parsedNames;
 
         /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/util/iso/DefaultLocalName.java 
b/core/sis-metadata/src/main/java/org/apache/sis/util/iso/DefaultLocalName.java
index e11a7b1d08..1ed4135186 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/util/iso/DefaultLocalName.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/util/iso/DefaultLocalName.java
@@ -86,6 +86,7 @@ public class DefaultLocalName extends AbstractName implements 
LocalName {
      * value for stopping iterative searches (using GLOBAL would have higher 
risk of never-ending
      * loops in case of bug), and in order to reduce the stream size during 
serialization.
      */
+    @SuppressWarnings("serial")
     final NameSpace scope;
 
     /**
@@ -112,6 +113,7 @@ public class DefaultLocalName extends AbstractName 
implements LocalName {
      *   </gco:TypeName>
      * }
      */
+    @SuppressWarnings("serial")
     @XmlJavaTypeAdapter(CharSequenceAdapter.class)
     @XmlElement(name = "aName", namespace = Namespaces.GCO)
     final CharSequence name;
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/util/iso/DefaultMemberName.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/util/iso/DefaultMemberName.java
index 462b151aff..4182fe0cfc 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/util/iso/DefaultMemberName.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/util/iso/DefaultMemberName.java
@@ -63,6 +63,7 @@ public class DefaultMemberName extends DefaultLocalName 
implements MemberName {
     /**
      * The type of the data associated with the record member.
      */
+    @SuppressWarnings("serial")
     @XmlElement(required = true)
     private final TypeName attributeType;
 
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/util/iso/DefaultNameSpace.java 
b/core/sis-metadata/src/main/java/org/apache/sis/util/iso/DefaultNameSpace.java
index 9fbe7bdfb4..1d30650911 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/util/iso/DefaultNameSpace.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/util/iso/DefaultNameSpace.java
@@ -93,6 +93,7 @@ public class DefaultNameSpace implements NameSpace, 
Serializable {
     /**
      * The name of this namespace, usually as a {@link String} or an {@link 
InternationalString}.
      */
+    @SuppressWarnings("serial")
     private final CharSequence name;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/util/iso/DefaultRecord.java 
b/core/sis-metadata/src/main/java/org/apache/sis/util/iso/DefaultRecord.java
index b473aa7762..80597500b3 100644
--- a/core/sis-metadata/src/main/java/org/apache/sis/util/iso/DefaultRecord.java
+++ b/core/sis-metadata/src/main/java/org/apache/sis/util/iso/DefaultRecord.java
@@ -74,6 +74,7 @@ public class DefaultRecord implements Record, Serializable {
     /**
      * The type definition of this record. Can not be {@code null}.
      */
+    @SuppressWarnings("serial")
     final RecordDefinition definition;
 
     /**
@@ -81,6 +82,7 @@ public class DefaultRecord implements Record, Serializable {
      * which is why the type is not {@code Object[]}. Should never be {@code 
null}, except
      * temporarily during XML unmarshalling.
      */
+    @SuppressWarnings("serial")         // Not statically typed as 
Serializable.
     private Object values;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/util/iso/DefaultRecordType.java
 
b/core/sis-metadata/src/main/java/org/apache/sis/util/iso/DefaultRecordType.java
index 60d6bfc1ee..caf55c6c1f 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/util/iso/DefaultRecordType.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/util/iso/DefaultRecordType.java
@@ -110,6 +110,7 @@ public class DefaultRecordType extends RecordDefinition 
implements RecordType, S
      *
      * @see #getTypeName()
      */
+    @SuppressWarnings("serial")
     private final TypeName typeName;
 
     /**
@@ -117,6 +118,7 @@ public class DefaultRecordType extends RecordDefinition 
implements RecordType, S
      *
      * @see #getContainer()
      */
+    @SuppressWarnings("serial")
     private final RecordSchema container;
 
     /**
diff --git 
a/core/sis-metadata/src/main/java/org/apache/sis/util/iso/RecordDefinition.java 
b/core/sis-metadata/src/main/java/org/apache/sis/util/iso/RecordDefinition.java
index cb8a8d1e2e..1ff3343296 100644
--- 
a/core/sis-metadata/src/main/java/org/apache/sis/util/iso/RecordDefinition.java
+++ 
b/core/sis-metadata/src/main/java/org/apache/sis/util/iso/RecordDefinition.java
@@ -70,6 +70,7 @@ abstract class RecordDefinition {                             
          // Inten
         /**
          * The wrapped record type.
          */
+        @SuppressWarnings("serial")                     // Not statically 
typed as Serializable.
         private final RecordType recordType;            // This is the only 
serialized field in this file.
 
         /**

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