Re: [xsl] Count items in a key ?

[David Carlisle <davidc@xxxxxxxxx>]

On 15/10/2010 11:10, Hermann Stamm-Wilbrandt wrote:
> I followed the whole thread on this and a key can match nodes only.
> What do you mean with reverse key?

Yes I wondered about that after I wrote it. As you may have noticed 
sometimes my xsl-list answering fingers are not totally connected to my 
brain.

I think basically I was thinking of this, given

xsl:key name="k" match="*[@id]" use="@id"

then the set of keys is got by doing something like

select="distinct-values(//*/@id)"

so can you speed up that // using a key?

to do it with a key you'd probably have to do something like

xsl:key name="r" match="@id" use="''"

but using a key with a constant key is probably just an inefficient 
alternative to using a variable, especially if you are only going to use 
it once, as in

select="distinct-values(key('r',''))

or something....

David

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