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https://issues.apache.org/jira/browse/XERCESJ-1615?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13797830#comment-13797830
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Mukul Gandhi commented on XERCESJ-1615:
---------------------------------------
I can see that if the schema document redefined.xsd that the schema you've
posted refers to is not provided, a NullPointerException occurs. But if
redefined.xsd is provided as well, an exception doesn't come and the XSD
validator produces a legitimate response.
I agree, in this case ideally a proper error must be generated instead of
NullPointerException. In the meantime, users using our XSD engine withing a
programming environment, may write a suitable exception handler to handle this
exception gracefully.
Moreover, if its clearly obvious (in some cases) that a schema document like
redefined.xsd is needed, then just provide it instead of expecting the XSD
validator to handle every kinds of exception.
> Error not reported on duplicate attributes
> ------------------------------------------
>
> Key: XERCESJ-1615
> URL: https://issues.apache.org/jira/browse/XERCESJ-1615
> Project: Xerces2-J
> Issue Type: Bug
> Components: XML Schema 1.0 Structures, XML Schema 1.1 Structures
> Affects Versions: 2.11.0
> Reporter: Octavian Nadolu
> Assignee: Mukul Gandhi
>
> If I validate the following schema Xerces does not complain about the the
> duplicate attribute. The same attribute group is referred twice.
> You can reproduce the issue on the xml-schema-1.1-dev branch.
> -------- schema.xsd --------------------
> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";
> elementFormDefault="qualified">
> <xs:complexType name="baseType">
> <xs:attributeGroup ref="globalAttributes"/>
> <xs:attributeGroup ref="globalAttributes"/>
> </xs:complexType>
>
> <xs:attributeGroup name="globalAttributes">
> <xs:attribute name="id" type="xs:ID"/>
> </xs:attributeGroup>
> </xs:schema>
> -------------------------------------------------------
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