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> Out of curiosity, if <dict> was simply defined as an ordered sequence > of elements, where the even elements are the keys and the odd > elements > the values, how would the XQuery look like? > Doing this without the sibling axis, I think you would have to do something like $elements[1 + for $e at $pos in $elements where ($pos mod 2 = 1) and $e=$param return $pos] Interestingly, the usual argument for not supporting the following-sibling axis is that it's difficult to optimize - I wonder how good optimizers are at handling the alternative? Michael Kay http://www.saxonica.com/
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