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https://issues.apache.org/jira/browse/XALANJ-2379?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12489438
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David Bertoni commented on XALANJ-2379:
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There are no empty text nodes in the XPath data model, so Xalan-J's behavior is
correct.
As Joe pointed out, you need to understand how XPath treats empty node sets,
before you can understand this behavior.
> Empty node text comparisons failing
> -----------------------------------
>
> Key: XALANJ-2379
> URL: https://issues.apache.org/jira/browse/XALANJ-2379
> Project: XalanJ2
> Issue Type: Bug
> Affects Versions: 2.7
> Environment: Windows XP SP2, Eclipse 3.2.2 (build M20070212-1330)
> Reporter: Joe
> Priority: Critical
> Attachments: test.xml, test.xsl, test_output.xml
>
>
> When a text comparison on an empty node is performed, it never returns true.
> For example, if I were to use this variable:
> <xsl:variable name="testcase1" select="text()=''"/>
> this will always return false.
> Yet, if I do:
> <xsl:variable name="testcase1" select="string-length(text())=0"/>
> This returns the correct result.
> I will attach a test case to this bug report.
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