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RE: Re: Hello XQuery ... Goodbye XSLT?

  • To: Dimitre Novatchev <dnovatchev@y...>, xml-dev@l...
  • Subject: RE: Re: Hello XQuery ... Goodbye XSLT?
  • From: "Kirkham, Pete (UK)" <pete.kirkham@b...>
  • Date: Thu, 11 Nov 2004 13:23:52 +0000
  • Thread-index: AcTH46nC2qYowdvASbSFg4oLe1zZogADDRWg
  • Thread-topic: Re: Hello XQuery ... Goodbye XSLT?

xquery recursion

> Dimitre Novatchev

> To avoid recursion in tree processing (isn't this what XSLT
> and XQuery are all about)? This should be impossible by definition.

It depends what you mean by recursion- when Rick Marshall mentioned it, I scanned through all the code I'd written in the last month, and all the tree processing iterates on an explicit stack rather then using recursion at the language level (big trees). There are far more cases of conceptual recursion rather than language level recursion- in SAX for example the calls on the handler for nested element are conceptually 'inside' the calls for the enclosing element, event though they are made sequentially and iteratively.

Anyway, all recursive algorithms can be transformed to iterative ones, and visa-versa.


Pete

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