Michael Kay wrote:
<xsl:template name="rand">
<xsl:param name="scale" select="6" />
<xsl:variable name="seed" />
<xsl:choose>
<xsl:when test="function-available('exsl:node-set')">
<xsl:value-of select="document(concat('/cgi-bin/rand.pl?',
$scale, '&x=', generate-id(exsl:node-set($seed))))" />
</xsl:when>
<xsl:when test="function-available('msxsl:node-set')">
<xsl:value-of select="document(concat('/cgi-bin/rand.pl?',
$scale, '&x=', generate-id(msxsl:node-set($seed))))" />
</xsl:when>
</xsl:choose>
</xsl:template>
</xsl:stylesheet>
That'll give you six random values, assuming the Perl script
recognizes the &x=Idxxxxx as cache-append garbage.
Interesting approach however when I test it with browsers
then Firefox (3.0), Opera (9.63) and Safari (3.2) all seem to
generate the same id each time that template is called:
http://home.arcor.de/martin.honnen/xslt/test2009072402.xml
(stylesheet:
http://home.arcor.de/martin.honnen/xslt/test2009072402Xsl.xml)
Only IE (tested with IE 8) generates different ids.
In XSLT 1.0 (I was surprised to rediscover just now), the value of variable
$seed is not a result tree fragment, it is a zero-length string. So I'm a
little bit surprised that exslt:node-set() should work on it at all, and not
particularly surprised that it should generate the same node-set each time.
The stylesheet I used for testing
(http://home.arcor.de/martin.honnen/xslt/test2009072402Xsl.xml) does
create a result tree fragment with some contents in xsl:variable.
Otherwise the test case would not have worked at all with some
implementations (Opera for instance).
--
Martin Honnen
http://msmvps.com/blogs/martin_honnen/
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