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Re: [xsl] Keying over added attributes in temporary tree

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Awesome! That's what I was looking for. Thanks.
-Tim

On 1/27/06, David Carlisle <davidc@xxxxxxxxx> wrote:
>
>   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
>
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