>>>>> "Andrew" == Andrew Welch <andrew.j.welch@xxxxxxxxx> writes:

    >>> Or of course you can arrange that the attribute in the source
    >>> is called xml:lang and use the lang() function.

    Andrew> Out of interest, does xml:lang annotate the input tree, or
    Andrew> does the lang() function walk the ancestor axis behind the
    Andrew> scenes?  Or is it all implementation dependent?

Well, it's implementation dependent, but the behaviour must be as if
it walks the ancestor axis.
-- 
Colin Adams
Preston Lancashire