> What does means this "for-each" as soon as I use it only to 
> load a document 

<xsl:for-each> performs two functions: it iterates over a node-set, and it
changes the current node. It is often used (as in this example) for the
second purpose alone.
 
> Also, I'm a little bit curious on performances : for now the document 
> database is not so heavy. But let suppose, later having a 10000 document 
> database with something like 100 keyref in each document.

Parsing and loading 10000 documents is going to require a fast processor, a
large memory, and a lot of patience.

> Would an XSL transformer need to load the shared file 100 times per 
> document ? 

If you make several calls on document() with the same URI, the processor is
obliged to return the same document each time: in other words, it won't
reload it.

Mike Kay


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