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RE: [xsl] the nearest ancestor with the attribute
Subject: RE: [xsl] the nearest ancestor with the attribute From: Oliver Becker <obecker@xxxxxxxxxxxxxxxxxxxxxxx> Date: Thu, 18 Jan 2001 11:02:59 +0100 (MET) |
> Noting that /@attr = /attribute::attr > > I guess this means that since attribute axis is in document order, > this means, since its the last step, that document order rules > for this expression? Well, attributes of an element aren't ordered in a defined way. The order is implementation dependent. You can't tell, what @*[1] gives. Document order or reverse document order is *only* important in location steps, or to be more specific, in the predicates of a step. If you have an expression that evaluates to a node-set and apply a predicate, then this predicate "filters the node-set with respect to the child axis." (see XPath 3.3) Don't know, why it was phrased this way, I think it means exactly the same as <<the nodes of an expression are ordered in document order>>. Or is there a slight difference that I haven't discovered yet? (See also the note in 3.3 of XPath) Conclusion: If there's a predicate, look to what "XPath construct" it applies. If it's a step then the axis is important, since some of them are reverse axes. If it's an expression (evaluating to a node-set) then the order is always document order. If you use xsl:value-of or the string function then you get always the string-value of the first node in document order. If you use xsl:for-each or xsl:apply-templates then the nodes are always processed in document order. Cheers, Oliver /-------------------------------------------------------------------\ | ob|do Dipl.Inf. Oliver Becker | | --+-- E-Mail: obecker@xxxxxxxxxxxxxxxxxxxxxxx | | op|qo WWW: http://www.informatik.hu-berlin.de/~obecker | \-------------------------------------------------------------------/ XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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