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Editorial Team
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Asked: 2026-05-18T12:22:56+00:00

Given the following xml: <Document xmlns=urn:company.com:catalog.01 xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance> <book> <author>Wells</author> </book> </Document> With Xerces the

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Given the following xml:

<Document xmlns="urn:company.com:catalog.01" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <book>
        <author>Wells</author>
    </book>
</Document>

With Xerces the following xpath query works:

//urn:company.com:catalog.01:author

When I use Saxon (v 8.7) I a StaticError with message ‘Invalid QName local part {company.com:catalog….}’.

What should the Xpath query look like to get the value of author?

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1 Answer

  1. Editorial Team

    Xerces should not allow an XPath expression like

    //urn:company.com:catalog.01:author

    XPath is XML Names compliant, so a : (colon) in a QName divides the prefix part from local name part of a QName.

    There is no syntax in XPath to use the full expanded QName in name test:

    You could use

    //*[local-name()='author'][namespace-uri()='urn:company.com:catalog.01']
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