Okay, I didn't see the class created since I'm trying to filter out
triples defined in my GSIVocabulary.
There is a difference between how an undefined class and an undefined
property is handled though. When a namespace is used in the xml, the
undefined property is created and defined using the base URI of the
ConvertXMLToRDF step. However, when a namespace is used on an
undefined element, the class is defined using the base URI of the GSI
namespace.
Therefore, you are right; they are both created when undefined.
However, they are created differently; they are created with
difference namespaces.
You can see these differences in the output from your script:
gsi:undefinedClass
rdf:type owl:Class ;
rdfs:label "gsi:undefinedClass" ;
sxml:element gsi:undefinedClass .
mymod:gsisomeUndefinedAtt-skosConcept
rdf:type owl:DatatypeProperty ;
rdfs:domain skos:Concept ;
rdfs:label "gsi:someUndefinedAtt" ;
sxml:attribute "gsi:someUndefinedAtt" .
Thanks,
Catrina
On Nov 23, 12:09 am, Scott Henninger <[email protected]>
wrote:
> Catrina; I have attached a script that converts XML to an existing RDF
> model. I've tried to reproduce your scenario. The example does create a
> class named 'gsi:undefinedClass'. Take a look and see if it works for you,
> and let me know if something different needs to be tried.
> In general, ConvertXMLtoRDF will create a class for each XML element type
> found and an instance for each element in the XML file. Attributes are tied
> to elements in XML (meaning the same attribute name in different element tags
> are defined to be different attributes), therefore a unique property is
> created for each element-attribute pair.
> So element/attribute mapping to RDF is slightly different because XML treats
> them differently than in RDF. But a class should be created for each element
> type.
> -- Scott
> Catrina wrote:When I want to import XML using a predefined RDF data model, I
> use the sxml:attribute property to map an XML attribute to a predefined RDF
> property. If I do not add the sxml:attribute property to my data model, then
> a new property is created when my XML is converted to RDF (ConvertXMLToRDF
> module). A new property is created even if I try to use a namespace on the
> attribute (as shown in the example outlined below). However, when my XML
> contains an element that is NOT predefined in my RDF data model and I use the
> data model's namespace on the undefined element, a new Class is NOT created
> during the ConvertXMLToRDF. There seems to be an inconsistency between the
> way attributes and elements are handled when they are not predefined in the
> given namespace of the RDF data model. Should undefined attributes(RDF
> properties) and elements(RDF classes) be handled different? ----------------
> EXAMPLE: Input XML: <skos:Concept
> xmlns:skos="http://www.w3.org/2004/02/skos/core"xmlns:gsi="http://www.myURI.com/GSIVocabulary"gsi:virtual="false";
> gsi:topicOrder="0" skos:prefLabel="All Topics" gsi:someUndefinedAtt="some
> undefined property value"><gsi:undefinedClass rdfs:label="undefined class
> node"></ gsi:undefinedClass></skos:Concept> As you can see, my XML includes 2
> undefined items; gsi:someUndefinedAtt attribute and gsi:undefinedClass. I
> labeled them undefined since neither one exists in
> xmlns:gsi="http://www.myURI.com/ GSIVocabulary". When I import this XML and
> convert to RDF, a new property is created for the undefined attribute as
> expected. However, a new class is not created for the undefined element. NEW
> PROPERTY IN
> RESULTS:<http://www.myURI.com/GSI_A#gsisomeUndefinedAtt-skosConcept>rdf:type
> owl:DatatypeProperty ; rdfs:domain skos:Concept ; rdfs:label
> "gsi:someUndefinedAtt" ; sxml:attribute "gsi:someUndefinedAtt" . REFERENCE TO
> UNDEFINED CLASS IN RESULTS (but no new class
> created):<http://www.myURI.com/GSI_A#Documentr-0>rdf:type gsi:undefinedClass
> ; rdfs:label "undefined class node" ; Thanks, Catrina -- You received this
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>
> XMLtoRDFex.zip
> 2KViewDownload
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