Hi,
I think there is a bug in the MarkLogic implementation of the
<xsl:analyze-string> element.
It seems that you cannot have more than one character between regex
groups.
My original issue was date ranges, where there could be a “-“ or “- “
between the dates, and wasted some some investigating hyphens in
character classes.
But the problem occurs with ANY two characters, even if I know the
exact order. So, if the dates were going to be formatted like this:
<Dates>2004xy2006</Dates>
Then it still fails when I try this:
<xsl:template match="Dates">
<xsl:variable name="inputString"><xsl:value-of
select="."/></xsl:variable>
<xsl:choose>
<xsl:when test="matches($inputString, '(\d\d\d\d)xy(\d\d\d\d)',
'i')">
<xsl:analyze-string select="$inputString"
regex="(\d\d\d\d)xy(\d\d\d\d)" flags="i">
<xsl:matching-substring>
<Dates>
<Date><xsl:value-of select="regex-group(1)"/></Date>
<Date><xsl:value-of select="regex-group(2)"/></Date>
</Dates>
</xsl:matching-substring>
</xsl:analyze-string>
</xsl:when>
</xsl:choose>
</xsl:template>
The matches() function works fine, but the second <Date> element in
the output is empty. So the regex attribute is not working correctly.
The problem cannot be avoided by using a character class [...] *, or
even by adding + or* to a single character!
Incidentally, it does recover thereafter. So, if there is a third
group, then that will be output correctly.
Of course, the solution is to just make the intermediate characters
into a group too, even though I don’t want that group. But I still
think this is a bug that is worth noting.
Neil.
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