> <xsl:template match="text()">
>  <xsl:analyze-string select="." regex="\\\\\\(\\\?([a-z])"
>    <xsl:matching-substring>
>      <xsl:choose>
>        <xsl:when test="regex-group(1)='s'">...
>        <xsl:when test="regex-group(1)='c'">...
> 
> What I don't understand is what an XSLT 2 processor does when 
> I pass it a text node like:
> 
> abab\(?sabab\(?cabab
> 
> There are two matches here: \(?s and \(?c . When my 
> <xsl:choose> finds the first match (it's the first <xsl:when> 
> within the <xsl:choose>), doesn't it just replace all 
> instances of \(?s and then not read the rest of the 
> <xsl:when> lines? That is, won't it fail to find the subsequent \(?c ?

The xsl:matching-substring instruction is executed once for each match. So
it's executed once to process \(?s, and once to process \(?c. In the first
case, the first xsl:when fires. In the second case, the second xsl:when
fires.

Michael Kay
http://www.saxonica.com/