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   RE: [xml-dev] [newbie] Mapping a Map 101?

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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

$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


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