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Re: filtering by ancestor

Subject: Re: filtering by ancestor
From: Jeni Tennison <jeni@xxxxxxxxxxxxxxxx>
Date: Wed, 12 Jun 2002 22:21:42 +0100
Re:  filtering by ancestor
Hi Konrad,

> I'm writing a breadth-first parser but I want to restrict the parse to
> /resultset/result[1]
> So at any given node I need the subset of following::* that has
> /resultset/result[1] as an ancestor.

You could use:

  following::*[ancestor::result[generate-id() =
                                generate-id(/resultset/result[1])]]

which says "find the elements following this node that have as an
ancestor a result element whose unique ID is the same as the unique ID
of /resultset/result[1]".

Since /resultset/result[1] is static, it would be best to store that
(or its generated ID) in a variable rather than calculating it for
each ancestor result of each following element from the current node:

  <xsl:variable name="result"
                select="generate-id(/resultset/result[1])" />

and then:

  following::*[ancestor::result[generate-id() = $result]]

Cheers,

Jeni

---
Jeni Tennison
http://www.jenitennison.com/


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