XSL analyze-string difficulty with tokenized strings - regex

Question

I need to tokenize a string and then run analyze-string on each of the tokens. This, however, seems impossible:
"XPTY0020: Required item type of the context item for the child axis
is node(); supplied value has item type xs:string) because
analyze-string requires a node context".
This is driving me insane, because analyze-string should, well, analyze strings, so I don't understand how to go around this problem.
My (simplified) XML looks like this:
<?xml version="1.0" encoding="UTF-8"?>
<rows>
<row>
<field name="def">1) ἀλλά sed, vero 2) καί et 3) а cum condicionali iunctum aequiparat
аште: 4) ἵνα ut chron.</field>
</row>
<row>
<field name="def">ἡλοῦν clavo figere</field>
</row>
</rows>
and my stylesheet looks like this:
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema" version="2.0">
<xsl:strip-space elements="*"/>
<xsl:output omit-xml-declaration="no" indent="yes"/>
<xsl:template match="field[#name = 'def']">
<entry>
<xsl:call-template name="sense">
<xsl:with-param name="def" select="."/>
</xsl:call-template>
</entry>
</xsl:template>
<xsl:template name="sense">
<xsl:param name="def"/>
<xsl:param name="separator" select="'\d{1,2}\)\s'"/>
<xsl:for-each select="tokenize(normalize-space($def), $separator)">
<xsl:if test="string-length(.) > 0">
<xsl:element name="sense">
<xsl:attribute name="n">
<xsl:value-of select="position() - 1"/>
</xsl:attribute>
<!--this is the problematic bit, because current() is
a string here -\- and, paradoxically, analyze-string
cannot deal with it-->
<xsl:analyze-string select="current()"
regex="^([\p{IsGreek}\p{IsGreekExtended}]+[\s]*[\p{IsGreek}\p{IsGreekExtended}]*)(.*$)">
<xsl:matching-substring>
<greek>
<xsl:value-of select="regex-group(1)"/>
<xsl:value-of select="regex-group(2)"/>
</greek>
</xsl:matching-substring>
<xsl:non-matching-substring>
<xsl:value-of select="current()"/>
</xsl:non-matching-substring>
</xsl:analyze-string>
</xsl:element>
</xsl:if>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
Without the problematic of analyze-string, the above stylesheet will correctly produce the following output:
<?xml version="1.0" encoding="UTF-8"?>
<entry xmlns:xs="http://www.w3.org/2001/XMLSchema">
<sense n="1">ἀλλά sed, vero </sense>
<sense n="2">καί et </sense>
<sense n="3">а cum condicionali iunctum aequiparat аште: </sense>
<sense n="4">ἵνα ut chron.</sense>
</entry>
<entry xmlns:xs="http://www.w3.org/2001/XMLSchema">
<sense n="0">ἡλοῦν clavo figere</sense>
</entry>
The stylesheet uses the tokenize() method in order to separate multiple senses. Then, for each of the identified senses, I want to use analyze-string to wrap the first greek word with <greek></greek>.
What workaround can I use to make analyze-string work on tokens, i.e. strings, rather than nodes?
Many thanks in advance!

Answer 1

I think the problem is that the regex attribute allows attribute value templates so your curly braces need to be doubled to say
regex="^([\p{{IsGreek}}\p{{IsGreekExtended}}]+[\s]*[\p{{IsGreek}}\p{{IsGreekExtended}}]*)(.*$)"
Or you need to define the pattern outside in a variable e.g.
<xsl:variable name="pattern">^([\p{IsGreek}\p{IsGreekExtended}]+[\s]*[\p{IsGreek}\p{IsGreekExtended}]*)(.*$)</xsl:variable>
and use regex="{$pattern}".