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RE: [xsl] XSL/XPath to generate a list of ancestors?

2008-05-12 09:14:22

     <xsl:template match="*" name="fullNameWorker" mode="fullName">
         <xsl:if test=".!=/">
             <xsl:apply-templates select=".." mode="fullName"/>
             <xsl:if test="..!=/">.</xsl:if>
             <xsl:value-of select="@name"/>
         </xsl:if>
     </xsl:template>

Never use != to compare node identity. It can be very expensive and it gives
the wrong answer. For example if your document is

<doc><subdoc>
    ...
  </subdoc></doc>

then doc and subdoc both compare equal to "/", and if the document is 100Mb
in size then you will be comparing some very long strings to prove it.

In 2.0, use "is". In 1.0, use generate-id(A)=generate-id(B).

Michael Kay
http://www.saxonica.com/


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