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At 11:10 AM 9/12/2008, David wrote:
Yes. Their semantics are different, but they return the same node, which I guess makes them equivalent.
The difference between //para[1] and (//para)[1] is that in the former case, the predicate operates only on the final step of a path with two steps, whereas in the latter, the predicate operates on the node set returned by the expression as a whole. This is much easier to see in the long form:
//para[1] is /descendant-or-self::node()/child::para[1]
(//para)[1] is (/descendant-or-self::node()/child::para)[1]
Re: [xsl] How to get page range within a group
Subject: Re: [xsl] How to get page range within a group From: Wendell Piez <wapiez@xxxxxxxxxxxxxxxx> Date: Fri, 12 Sep 2008 17:11:33 -0400 |
At 11:10 AM 9/12/2008, David wrote:
> (//para)[1] > > and > > /descendant::para[1] > > are equivalent?
yes,
although of course the real expansion is
(/descendant-or-self::node()/child::para)[1]
but it comes to the same thing in this case.
Yes. Their semantics are different, but they return the same node, which I guess makes them equivalent.
The difference between //para[1] and (//para)[1] is that in the former case, the predicate operates only on the final step of a path with two steps, whereas in the latter, the predicate operates on the node set returned by the expression as a whole. This is much easier to see in the long form:
//para[1] is /descendant-or-self::node()/child::para[1]
(//para)[1] is (/descendant-or-self::node()/child::para)[1]
Cheers, Wendell
====================================================================== Wendell Piez mailto:wapiez@xxxxxxxxxxxxxxxx Mulberry Technologies, Inc. http://www.mulberrytech.com 17 West Jefferson Street Direct Phone: 301/315-9635 Suite 207 Phone: 301/315-9631 Rockville, MD 20850 Fax: 301/315-8285 ---------------------------------------------------------------------- Mulberry Technologies: A Consultancy Specializing in SGML and XML ======================================================================
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