XML/XSLT stylesheet/instance of

instance of element()

   <source lang="xml">

File: Data.xml <?xml version="1.0"?> <addressbook>

 <address>
   <street>1234 Main Street</street>
   <city>Z</city>
   <state>WI</state>
   <zip>48392</zip>
 </address>

</addressbook> File: Transform.xslt <?xml version="1.0"?> <xsl:stylesheet version="2.0"

 xmlns:xs="http://www.w3.org/2001/XMLSchema"
 xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
 <xsl:output method="text"/>
 <xsl:template match="/">
   <xsl:variable name="cities" as="item()*">
     <xsl:sequence select="addressbook/address/city"/>
     <xsl:sequence select="("A", "B", "C")"/>
     <xsl:sequence select="("D", "E", "F")"/>
   </xsl:variable>
   <xsl:text>Our customers live in these cities:

</xsl:text>
   <xsl:for-each select="$cities">
     <xsl:choose>
       <xsl:when test=". instance of element()">
         <xsl:text>        Node: </xsl:text>
       </xsl:when>
       <xsl:otherwise>
         <xsl:text>Atomic value: </xsl:text>
       </xsl:otherwise>
     </xsl:choose>
     <xsl:value-of select="."/>
     <xsl:text>
</xsl:text>
   </xsl:for-each>
 </xsl:template>

</xsl:stylesheet> Output: Our customers live in these cities:

       Node: Z

Atomic value: A Atomic value: B Atomic value: C Atomic value: D Atomic value: E Atomic value: F

</source>
   
  

Some tests of the "instance of" operator

   <source lang="xml">

File: Data.xml

File: Transform.xslt <?xml version="1.0"?> <xsl:stylesheet version="2.0"

 xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
 xmlns:xs="http://www.w3.org/2001/XMLSchema">
 <xsl:output method="text"/>
 <xsl:template match="/">
   <xsl:text>
Some tests of the "instance of" operator:</xsl:text>
   <xsl:text>

  "1995-04-21" instance of xs:date: </xsl:text>
   <xsl:value-of select=""1995-04-21" instance of xs:date"/>
   <xsl:text>
  xs:date("1995-04-21") instance of xs:date: </xsl:text>
   <xsl:value-of select="xs:date("1995-04-21") instance of xs:date"/>
   <xsl:text>

  3 instance of xs:integer: </xsl:text>
   <xsl:value-of select="3 instance of xs:integer"/>
   <xsl:text>
  "3" instance of xs:integer: </xsl:text>
   <xsl:value-of select=""3" instance of xs:integer"/>
   <xsl:text>
  number("3") instance of xs:integer: </xsl:text>
   <xsl:value-of select="number("3") instance of xs:integer"/>
   <xsl:text>
  number("3") instance of xs:double: </xsl:text>
   <xsl:value-of select="number("3") instance of xs:double"/>
   <xsl:text>
  xs:integer("3") instance of xs:integer: </xsl:text>
   <xsl:value-of select="xs:integer("3") instance of xs:integer"/>
   <xsl:text>
  "3" cast as xs:integer instance of xs:integer: </xsl:text>
   <xsl:value-of select=""3" cast as xs:integer instance of xs:integer"/>
   <xsl:text>
  "e" instance of xs:integer: </xsl:text>
   <xsl:value-of select=""e" instance of xs:integer"/>
 </xsl:template>

</xsl:stylesheet> Output:

Some tests of the "instance of" operator:

 "1995-04-21" instance of xs:date: false
 xs:date("1995-04-21") instance of xs:date: true
 3 instance of xs:integer: true
 "3" instance of xs:integer: false
 number("3") instance of xs:integer: false
 number("3") instance of xs:double: true
 xs:integer("3") instance of xs:integer: true
 "3" cast as xs:integer instance of xs:integer: true
 "e" instance of xs:integer: false
</source>