Re: Shallow copy and base URI

  Actually, I guess using a function as a launcher for the identity
  copy could be better, because I could use @select and avoid create a
  document node.

The document node is created (for xslt 1 compatibility as much as
anything else) if you don't use any funk new attributes but if you go
(for example) 
    <xsl:variable name="tmp.tree" as="element()">
      <tree>


then the variable will hold a (parentless) element node rather than a
document node. this is useful sometimes although parentless eleemnts are
a bit scary, especially if you make two of them

   <xsl:variable name="tmp.tree" as="element()">
      <tree/>
      <tree/>
   </xsl:variable>

makes a variable that holds a sequence of two tree elements, but they
are not siblings of each other they are not even siblings of themselves,
if the current node is one of those tree elements ../* will not select
anything not even the current element as .. is empty.


Of course an alternative to making this extra <tree> element to hold
xml:base would be to modify mode="the.mode" so it added xml:base
attributes to some or all of the elements it generates. Which is easier
depends on what the mode="the.mode" templates look like.

David




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