RE: XSLT 1.0 support in browsers, as of June 2008
> Also, inreality how expensive is the ancestor axis? > > Saxon's TinyTree is interesting in that only the last sibling > contains the parent pointer, so to get the parent/ancestor > the siblings are traversed first to find the parent (I think > anyway) which suggests it could be expensive. That was true at one time. These days a pointer to the parent is inserted once every 20 children or so, so you avoid the pathological case. (In any case this only tended to arise with data-oriented XML; with documents the number of children per parent is rarely very large.) Michael Kay http://www.saxonica.com/
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