[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Not a nested for loop.
Hi Dave, > I need to loop through each of the main input document records (r > elements) and if r/cat-num is any one of the values of the external > file, /bk/n then I need to copy the r element and contents through > to the output. > > Can xslt2.0 help with this form of filtering? Of course you can it currently with: <xsl:copy-of select="r[cat-num = document('external.xml')/bk/n]" /> But it's not particularly efficient. For something more efficient you could use a key. In XSLT 1.0 you would do: <xsl:key name="nums" match="bk/n" use="." /> <xsl:for-each select="r"> <xsl:variable name="r" select="." /> <xsl:for-each select="document('external.xml')"> <xsl:if test="key('nums', $r/cat-num)"> <xsl:copy-of select="$r" /> </xsl:if> </xsl:for-each> </xsl:for-each> In XSLT 2.0 you can do: <xsl:key name="nums" match="bk/n" use="." /> <xsl:for-each select="r"> <xsl:if test="document('external.xml') /key('nums', current()/cat-num)"> <xsl:copy-of select="." /> </xsl:if> </xsl:for-each> Or you could do: <xsl:key name="nums" match="bk/n" use="." /> <xsl:copy-of select="for $r in r return if (document('external.xml') /key('nums', $r/cat-num)) then $r else ()" /> Cheers, Jeni --- Jeni Tennison http://www.jenitennison.com/ XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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