xml - Why is this XSLT max simulated function not working -


i not xslt, following known pattern simulate max function xslt 1.0.

edit: know thread subject may confusing, not trying build function, rather simulating same behavior

that is, have following xml:

<cards> <card><updated>2013-05-19t16:18:59z</updated></card> <card><updated>2013-05-19t20:41:59z</updated></card> <card><updated>2013-05-19t18:30:59z</updated></card> </cards>

i have following output:

max-updated:2013-05-19t20:41:59z

this xslt, it's not working expected:

<xsl:template match="cards">    max-updated:<xsl:value-of select="card[not(../card[updated] &gt; updated)]/updated"/> </xsl:template>

but output is:

max-updated:2013-05-19t16:18:59z

and seems retrieve first node.

i know first sort ordering , first (or last) position element, more interested on knowing doing wrong.

xslt 1.0 doesn't provide greater-than or less-than comparisons on strings: converts both strings numbers (giving nan) , comparing nan nan gives false.

the way compare strings magnitude in xslt 1.0 xsl:sort - sort elements , choose first/last.

or move xslt 2.0.


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