Subject: [xsl] Difference between preceding::foo[1] and (preceding::foo)[1] From: "Zwetselaar M. van (Marco)" <Marco.van.Zwetselaar@xxxxxxxxxxxxx> Date: Thu, 6 Sep 2001 15:12:06 +0200 |
Could someone shed some light on the following statement from Section 3.3 of the XPath 1.0 specification: "The Predicate [on an expression that is not a location path] filters the node-set with respect to the child axis"? The spec gives the following example (to warn against surprises): "NOTE: The meaning of a Predicate depends crucially on which axis applies. For example, preceding::foo[1] returns the first foo element in reverse document order, because the axis that applies to the [1] predicate is the preceding axis; by contrast, (preceding::foo)[1] returns the first foo element in document order, because the axis that applies to the [1] predicate is the child axis." Now, I understand the syntactic difference between preceding::foo[1] and (preceding::foo)[1]. In the first expression, the predicate is part of a location path, whereas in the second it is applied to an expression. The fact that these two expressions select different nodes is also clear to me. What I don't understand is how the predicate could apply to a CHILD axis. WHOSE child axis? I mean, the expression preceding::foo will select a node-set. Is this node-set anyone's child, and if so, whose then? Regards, Marco ***************************DISCLAIMER*********************************** Deze e-mail is uitsluitend bestemd voor de geadresseerde(n). Verstrekking aan en gebruik door anderen is niet toegestaan. Fortis sluit iedere aansprakelijkheid uit die voortvloeit uit electronische verzending. This e-mail is intended exclusively for the addressee(s), and may not be passed on to, or made available for use by any person other than the addressee(s). Fortis rules out any and every liability resulting from any electronic transmission. ************************************************************************ XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
Current Thread |
---|
|
<- Previous | Index | Next -> |
---|---|---|
RE: [xsl] Testing using XPath, Zwetselaar M. van (M | Thread | Re: [xsl] Difference between preced, Jeni Tennison |
[xsl] Testing using XPath, Stuart Brown | Date | RE: [xsl] Testing using XPath, Zwetselaar M. van (M |
Month |