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https://issues.apache.org/jira/browse/XERCESJ-1493?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12988773#comment-12988773
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Michael Glavassevich commented on XERCESJ-1493:
-----------------------------------------------
e-mail reply from Radu:
> The used Xerces version is 2.9.1.
> A sample XML Schema is:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";>
<xs:element name="personnel">
<xs:complexType>
<xs:sequence>
</xs:sequence>
</xs:complexType>
<xs:unique name="unique1">
<xs:field xpath="&#0;"/>
</xs:unique>
</xs:element>
</xs:schema>
> For example in our XML editor it blocks when calling this method on the
> sample XML schema:
>
> org.apache.xerces.parsers.XMLGrammarPreparser
>
> public Grammar preparseGrammar(String type, XMLInputSource
> is) throws XNIException, IOException
> Endless loop in xs:field xpath computation
> ------------------------------------------
>
> Key: XERCESJ-1493
> URL: https://issues.apache.org/jira/browse/XERCESJ-1493
> Project: Xerces2-J
> Issue Type: Bug
> Reporter: Radu Coravu
> Original Estimate: 2h
> Remaining Estimate: 2h
>
> If you have something like this in your XML Schema:
> <xs:field xpath="&#0;"/>
> and you try to validate it using Xerces the method:
> org.apache.xerces.impl.xpath.XPath.Scanner.scanExpr()
> will never end looping.
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