There's another option which I forgot about because I tend to prefer one of the
others: compute the sort key in the body of xsl:sort:
<xsl:for-each select="term">
<xsl:sort>
<xsl:choose>
<xsl:when test="fr/@sort">
<xsl:value-of select="fr/@sort"/>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="(lower-case(substring(fr,1,1)))"/>
</xsl:otherwise>
</xsl:choose>
</xsl:sort>
On 16 Mar 2021, at 16:24, Michael Kay mike(_at_)saxonica(_dot_)com
<xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com> wrote:
As David C and Martin suggest, write the sort key computation as a single
XPath expression if you can.
In the rare cases where you can't, call out to a function: compute the sort
key in a separate xsl:function, and call the function in xsl:sort/@select.
Michael Kay
Saxonica
On 16 Mar 2021, at 16:08, Dave Pawson dave(_dot_)pawson(_at_)gmail(_dot_)com
<xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com> wrote:
xml
<term>
<fr sort="">sourire</fr>
...
</term>
context is term
I want to sort on fr/@sort
or (if empty)
<xsl:value-of select="(lower-case(substring(fr,1,1)))"/>
error XTSE0010 Within xsl:for-each, xsl:sort elements must come before
other instructions
<xsl:for-each select="term">
<xsl:variable name='sort'>
<xsl:choose>
<xsl:when test="fr/@sort">
<xsl:value-of select="fr/@sort"/>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="(lower-case(substring(fr,1,1)))"/>
</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<xsl:sort select="$sort"/>
Any suggestions for a workaround please?
TiA
--
Dave Pawson
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Docbook FAQ.
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