Re: New Version of XPath Filter

>
>2. We choose to perform expansion from nodes to node trees outside
>the XPath processor to maximize the possible execution speed. It
>is much faster to evaluate and expand //Foo than to evaluate
>//Foo//self::node(). Remember, the only goal of this transform is
>speed; it doesn't provide any new capability.
>
I don't think that there is no new functionality at all. For example, 
uninon provides new ways
to apply some transforms to a part of the document and add more nodes 
later. Also some XPath
implementations operates on the actual nodes sets (no sub-trees!) and by 
this construction
S' is an additional and expensive operation!

Aleksey.