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https://issues.apache.org/jira/browse/JENA-1537?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16457639#comment-16457639
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Andy Seaborne commented on JENA-1537:
-------------------------------------
First pass (April 2018): [https://github.com/afs/jena-xerces]
Produced by taking the Apache Xerces source, cutting out packages not related
to datatypes, then putting back necessary common classes.
It passed the tests in {{org.apache.jena.datatypes}}.
One feature omitted: {{XSDDatatype.loadUserDefined}}. These functions parse XSD
scheme datatype definitions. The implementation calls into the internal XML
parsing which would not be legal in Java9 modules if using the JDK built-in
parser. It seems to need a fairly complete XML parser engine.
We should consider dropping this feature.
Example: (from Jena's test suite):
{noformat}
<xsd:simpleType name="over17">
<!-- values must be >= 18 -->
<xsd:restriction base="xsd:positiveInteger">
<xsd:minInclusive value="18"/>
</xsd:restriction>
</xsd:simpleType>
{noformat}
> Remove requirement for Apache Xerces.
> -------------------------------------
>
> Key: JENA-1537
> URL: https://issues.apache.org/jira/browse/JENA-1537
> Project: Apache Jena
> Issue Type: Improvement
> Components: Datatypes, RDF/XML
> Reporter: Andy Seaborne
> Priority: Major
>
> Apache Xerces is used for parsing and also for dataype support.
> We can switch to the JDK built-in XML parser (which is actually a forked
> Xerces).
> For jena-core datatype, we can extract the necessary code from Xerces and put
> it in Jena (repackaged).
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