Re: grouping + global variable (?) (was re: regexs,

2. Extended XSLT 1.0: create your first result by applying templates to your source and binding the results to a variable, which you then use a processor extension to turn into a node set for further processing. You'll probably need modes (if only to keep yourself sane), so:

<xsl:variable name="intermediate-result">
  <xsl:apply-templates select="/" mode="pass1"/>
</xsl:variable>

<xsl:template match="/">
<xsl:apply-templates select="exslt:node-set($intermediate-result)" mode="pass2"/>
</xsl:template>

<xsl:template match="/" mode="pass1">
  <xsl:apply-templates select="pass1"/>
</xsl:template>

where exslt:node-set is an extension function that creates a node-set from a result-tree-fragment (see exslt.org or consult your processor's documentation).

3. XSLT 2.0 -- same as 2, except no extension function is needed: it'll happen transparently.