RE: [xsl] selecting from sequences

Subject: RE: [xsl] selecting from sequences
From: "Michael Kay" <mike@xxxxxxxxxxxx>
Date: Thu, 18 Dec 2008 15:44:55 -0000
> If for example $seq contains elements a, b, c, b, e:
> how do I select
> A - everything before the first b
> B - everything from the first b to the end
> C - the position of the first b?

You don't actually say whether this is 1.0 or 2.0, but since you're talking
sequences rather than node-sets, I assume 2.0. The following might not be
the best solution, but works:

<xsl:variable name="index" as="xs:integer*">
  <xsl:for-each select="$seq">
    <xsl:if test="self::b">
      <xsl:sequence select="position()"/>


A - $seq[position() lt $index[1]]

B - $seq[position() ge $index[1]]

C - $index[1]

The details of course depend on what you want to happen if there is no b
element in the sequence.


<xsl:for-each-group select="$seq" group-starting-with="b">

might do what you want - but it depends exactly what you want to do.

Michael Kay

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