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RE: [newbie] Mapping a Map 101?

• To: "'PA'" <petite.abeille@g...>,<xml-dev@l...>
• Subject: RE: [newbie] Mapping a Map 101?
• From: "Michael Kay" <mike@s...>
• Date: Mon, 13 Dec 2004 16:46:05 -0000
• In-reply-to: <4F1CD323-4D18-11D9-A795-000393760B7E@g...>
• Thread-index: AcThJVKoLQkD0cY9SZOKrVoXUb4vbgADQMEg

> 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/

• References:
  • Re: [newbie] Mapping a Map 101?
    • From: PA <petite.abeille@g...>

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