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https://issues.apache.org/jira/browse/MNG-6036?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15315821#comment-15315821
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Roland Huss commented on MNG-6036:
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When Modello in its Xpp3 plugin (which generates the XML reader for Mave POMs)
ignore Namespaces in the XML declaration
(https://github.com/codehaus-plexus/modello/blob/master/modello-plugins/modello-plugin-xpp3/src/main/java/org/codehaus/modello/plugin/xpp3/Xpp3ReaderGenerator.java#L583)
then I wonder why it shouldn't ignore namespace prefixes, on tags, too ?
IMO this would be consistent behaviour and it would solve the issue here, too.
> Allow proper namespace usage for pom.xml
> ----------------------------------------
>
> Key: MNG-6036
> URL: https://issues.apache.org/jira/browse/MNG-6036
> Project: Maven
> Issue Type: Improvement
> Components: core
> Affects Versions: 3.3.9
> Environment: Apache Maven 3.3.9
> (bb52d8502b132ec0a5a3f4c09453c07478323dc5; 2015-11-10T17:41:47+01:00)
> Maven home: /usr/local/Cellar/maven/3.3.9/libexec
> Java version: 1.8.0_40, vendor: Oracle Corporation
> Java home: /Library/Java/JavaVirtualMachines/jdk1.8.0_40.jdk/Contents/Home/jre
> Default locale: en_US, platform encoding: UTF-8
> OS name: "mac os x", version: "10.11.4", arch: "x86_64", family: "mac"
> Reporter: Roland Huss
>
> When I use the following pom.xml in order to allow an XSD for my custom
> plugin configuration:
> {code:xml}
> <project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
> xmlns="http://maven.apache.org/POM/4.0.0";
> xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
> http://maven.apache.org/POM/4.0.0";>
> ....
> <plugin>
> ....
> <m:configuration xmlns:m="http://maven.apache.org/POM/4.0.0";
> xmlns="http://fabric8.io/fabric8-maven-plugin";>
> <myConfig>.....</myConfig>
> </m:configuration>
> </plugin>
> ....
> </project>
> {code}
> I get this error:
> {code}
> [INFO] Scanning for projects...
> [ERROR] [ERROR] Some problems were encountered while processing the POMs:
> [ERROR] Malformed POM
> /Users/roland/Development/docker/docker-maven-plugin/samples/data-jolokia-demo/pom.xml:
> Unrecognised tag: 'm:configuration' (position: START_TAG seen
> ...che.org/POM/4.0.0" xmlns="http://fabric8.io/fabric8-maven-plugin";>...
> @91:117) @
> /Users/roland/Development/docker/docker-maven-plugin/samples/data-jolokia-demo/pom.xml,
> line 91, column 117
> @
> [ERROR] The build could not read 1 project -> [Help 1]
> [ERROR]
> [ERROR] The project io.fabric8:docker-jolokia-demo:0.15-SNAPSHOT
> (/Users/roland/Development/docker/docker-maven-plugin/samples/data-jolokia-demo/pom.xml)
> has 1 error
> [ERROR] Malformed POM
> /Users/roland/Development/docker/docker-maven-plugin/samples/data-jolokia-demo/pom.xml:
> Unrecognised tag: 'm:configuration' (position: START_TAG seen
> ...che.org/POM/4.0.0" xmlns="http://fabric8.io/fabric8-maven-plugin";>...
> @91:117) @
> /Users/roland/Development/docker/docker-maven-plugin/samples/data-jolokia-demo/pom.xml,
> line 91, column 117 -> [Help 2]
> {code}
> It would be awesome if the XML parser would resolve namespaces properly. Its
> not about adding namespace features, only for plain XML resolving (each
> decent XML these days should be able to do this transparently).
> Except for
> https://cwiki.apache.org/confluence/display/MAVEN/Moving+forward+with+the+POM+data+model
> I couldn't find any statement when namespaces are supported or tolerated.
> Are there any plans for this (and maybe also to relax the schema constraints
> on the {{<configuration>}} tag) ?
> See also https://github.com/rhuss/poblano/issues/19 for a use case.
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