Re: [xml] wanted: an xpath expression

[Raymond Wiker <Raymond Wiker fast no>]

Stefan Seefeld writes:
> Sorry to reply to my own mail, but thinking about
> the problem I'll restate the goal:
>
> Imagine I have a hierarchy of 'item' elements (such
> as in a menu):
>
> <item title="foo">
>    <item title="bar">
>      <item title="bla"/>
>    </item>
>    <item title="baz">
>      <item title="bla"/>
>    </item>
> </item>
>
> I'd like to identify individual 'items'. I can't just use
> the 'title' attribute, as that may be ambiguous. However, using
> the whole path (i.e. a concatenation of all the title attributes
> of all parent items) in the tree would work.
>
> THe problem is now how to use that in xslt. I'd like to use
> such a structure as the menu for a set of pages, each identifying
> itself with one such 'menu item path'. When generating the menu in
> the navigation bar, I have to know whether 'this page' is inside
> the current 'item', so I can display it unfolded or collapsed.
>
> Is there a way to ask a given 'item' node whether it contains
> an item with the so constructed 'id' is 'foo.baz.bla' ?

        You can use an xpath expression like

item[ title='foo']/item[ title='bar']

<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
                version="1.0">

  <xsl:output method="text"/>

  <xsl:param name="selected-path" select="item[ title='foo']/item[ title='bar']/item[ title='bla']"/>

  <xsl:template match="/">
    <xsl:apply-templates select="$selected-path"/>
  </xsl:template>

  <xsl:template match="item">
    item: <xsl:value-of select="@title"/>
  </xsl:template>

</xsl:stylesheet>

-- 
Raymond Wiker                        Mail:  Raymond Wiker fast no
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