Subject: Re: [xsl] Keying over added attributes in temporary tree From: David Carlisle <davidc@xxxxxxxxx> Date: Fri, 27 Jan 2006 15:38:15 GMT |
I would assume that the keys are created before starting the "/" template. The xsl:key element is not allowed in a template, so that can't force the re-indexing for the key. The specification doesn't say when they are created, but in practice for performance reasons most systems only create them when (if) they are referenced by key(). keys (separately) index all trees, there is no way to specify an key only applies to one tree. So if you use xsl:key when the current node is in a temporary tree (or if you supply a node in a temporary tree as third argument) then that tree will be indexed using the specified key. 1) Is the xsl:variable "objects-with-new" considered a "temporary tree"? The value of that variable is a (document node of a) temorary tree, yes. 2) Is it possible to access the "object" elements in $objects-with-new via a key, where the @use is an attribute that was added after parsing the input document? Yes key('objects-by-new','a') if the current node is a descendant of $objects-with-new or key('objects-by-new','a',$objects-with-new) otherwise. so for example 20 <xsl:copy-of select="$objects-with-new//object[@new=2]"/> could be 20 <xsl:copy-of select="$objects-with-new/key('objects-by-new','2') "/> or 20 <xsl:copy-of select="key('objects-by-new','2',$objects-with-new) "/> David ________________________________________________________________________ This e-mail has been scanned for all viruses by Star. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk ________________________________________________________________________
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