Re: xpath index-of function using xslt 3.0

Am 03.10.2025 um 14:49 schrieb Mukul Gandhi mukulg@xxxxxxxxxxxxxxxxx:
> Hi all,
> B  B  B I've just been trying to implement XPath 3.1 function 'index-of',
> with XSLT 3.0 code using xsl:iterate instruction, and came up with
> following XSL stylesheet,
>
> <?xml version="1.0" encoding="UTF-8"?>
> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
> B  B  B  B  B  B  B  B  B  B  B  B 
B xmlns:xs="http://www.w3.org/2001/XMLSchema"
> B  B  B  B  B  B  B  B  B  B  B  B  B xmlns:fn0="http://fn0"
> B  B  B  B  B  B  B  B  B  B  B  B  B exclude-result-prefixes="#all"
> B  B  B  B  B  B  B  B  B  B  B  B  B version="3.0">
>
> B  B  <xsl:output method="xml" indent="yes"/>
>
> B  B  <xsl:variable name="var1" select="('abc1', 'abc2', 'abc1', 'abc5',
> 'abc4')" as="xs:string*"/>
>
> B  B  B <xsl:template match="/">
> B  B  B  B  B  <result>
> B  B  B  B  B  B  B  <xsl:for-each select="('abc1', 'abc4')">
> B  B  B  B  B  B  B  B  B  B <index srch="{.}"><xsl:value-of
> select="fn0:indexOf($var1, .)"/></index>
> B  B  B  B  B  B  B </xsl:for-each>
> B  B  B  B  B </result>
> B  B  B </xsl:template>
>
> B  B  B <xsl:function name="fn0:indexOf" as="xs:integer*">
> B  B  B  B  B  <xsl:param name="strList" as="xs:string*"/>
> B  B  B  B  B  <xsl:param name="srch1" as="xs:string"/>
> B  B  B  B  B  <xsl:iterate select="$strList">
> B  B  B  B  B  B  B  B <xsl:param name="result" select="()"
as="xs:integer*"/>
> B  B  B  B  B  B  B  B <xsl:on-completion>
> B  B  B  B  B  B  B  B  B  B  B <xsl:sequence select="$result"/>
> B  B  B  B  B  B  B  B </xsl:on-completion>
> B  B  B  B  B  B  B  B <xsl:if test=". = $srch1">


https://www.w3.org/TR/xpath-functions-31/#func-index-of says

The items in the sequence $seq are compared with $search under the rules
for the eq operator. Values of type xs:untypedAtomic are compared as if
they were of type xs:string. Values that cannot be compared, because the
eq operator is not defined for their types, are considered to be
distinct. If an item compares equal, then the position of that item in
the sequence $seq is included in the result.

So if you use = instead of eq you are not implementing theB XPath 3.1
function 'index-of'


> B  B  B  B  B  B  B  B  B  B  B <xsl:next-iteration>
> B  B  B  B  B  B  B  B  B  B  B  B  B  B <xsl:with-param name="result"
> select="($result, position())"/>
> B  B  B  B  B  B  B  B  B  B  B </xsl:next-iteration>
> B  B  B  B  B  B  B  B  </xsl:if>
> B  B  B  B  B  B  </xsl:iterate>
> B  B  B  B  </xsl:function>
>
> </xsl:stylesheet>
>
> The above cited stylesheet, produces following XSL transformation result,
>
> <?xml version="1.0" encoding="UTF-8"?><result>
> B  <index srch="abc1">1 3</index>
> B  <index srch="abc4">5</index>
> </result>
>
> This works fine with both Saxon-HE 12.5 XSLT 3.0 processor and Apache
> Xalan's XSLT 3.0 development code.
>
> Thought that, I should share this XSL stylesheet example, for comments
> from anyone interested within this XSL list.
>
>
> --
> Regards,
> Mukul Gandhi
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