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Re: XPath 1.0 challenge: select all XML Schema element

Subject: Re: XPath 1.0 challenge: select all XML Schema element declarations with type string
From: "David Carlisle d.p.carlisle@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Fri, 24 Jul 2015 22:07:02 -0000
Re:  XPath 1.0 challenge: select all XML Schema element
> 3. The following two XPath expressions come close to solving the
> problem. However, sometimes they return an element which should not be
> returned and sometimes they don't return an element which should be
> returned.
>
> (a) //xs:element[(@type = 'string') or (substring-after(@type, ':') = 'string')]
>
> (b) //xs:element[@type= concat(substring-before(name(),'element'),'string')]
>
> I must use XPath 1.0.  So which of those two XPath expressions would
> you recommend I use?

I think you are missing the namespace axis, anyway here are three different
xpaths that give three different results, take your pick....

(wrapped in XSLT but no XSLT used other than acting as a container for
the xpath)

======================

<xs:schema
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema"
 >

 <xs:element id="a" type="xs:string"/>
 <xs:element id="b" type="xsd:string"/>
 <xs:element  xmlns:xsd="http://notXMLSchema"
          id="c" type="xsd:string"/>
 <xs:element id="d" type="string"/>
 <xs:element id="e" type="z:string"/>
 <xs:element id="f" type=" xs:string "/>

</xs:schema>


===================

<xsl:stylesheet version="1.0"
        xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
        xmlns:xs="http://www.w3.org/2001/XMLSchema"
        >

 <xsl:output indent="yes"/>

 <xsl:template match="/">
  <x xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <aaaa>
  <xsl:copy-of select="//xs:element[(@type = 'string') or
(substring-after(@type, ':') = 'string')]"/>
  </aaaa>

  <bbbb>
  <xsl:copy-of select="//xs:element[@type=
concat(substring-before(name(),'element'),'string')]"/>
  </bbbb>

  <cccc>
   <xsl:copy-of select="//xs:element[
            (normalize-space(@type) = 'string')
               or
               (substring-after(normalize-space(@type), ':') = 'string'
               and
               namespace::*[.='http://www.w3.org/2001/XMLSchema']
               [name()=substring-before(normalize-space(../@type), ':')])]"/>
  </cccc>
  </x>
 </xsl:template>


==============

producing


   <aaaa>
      <xs:element id="a" type="xs:string"/>
      <xs:element id="b" type="xsd:string"/>
      <xs:element xmlns:xsd="http://notXMLSchema" id="c" type="xsd:string"/>
      <xs:element id="d" type="string"/>
      <xs:element id="e" type="z:string"/>
   </aaaa>
   <bbbb>
      <xs:element id="a" type="xs:string"/>
   </bbbb>
   <cccc>
      <xs:element id="a" type="xs:string"/>
      <xs:element id="b" type="xsd:string"/>
      <xs:element id="d" type="string"/>
      <xs:element id="f" type=" xs:string "/>
   </cccc>

David

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