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Re: XPath/XSLT 2.0 concerns

• To: robin.berjon@e..., Jeni Tennison <jeni@j...>
• Subject: Re: XPath/XSLT 2.0 concerns
• From: Elliotte Rusty Harold <elharo@m...>
• Date: Fri, 4 Oct 2002 07:53:55 -0400
• Cc: xml-dev@l...
• In-reply-to: <3D9B2667.1050004@e...>
• References: <72RLYT04POLJXV95A7FBMJXRM82TRVT.3d9a6f4c@MChamp><144498584266.20021002103555@j...><3D9B0101.4020504@t...> <3D9B0CB4.6010207@p...><3D9B13F8.20608@e...> <12522921521.20021002172133@j...><3D9B2667.1050004@e...>

At 7:01 PM +0200 10/2/02, Robin Berjon wrote:
>Hi Jeni,
>
>Jeni Tennison wrote:
>>>I don't believe that either and I'd add that it takes a pretty
>>>narrow view on XML but I can in fact see use cases for having access
>>>to types in XPath. For instance when I see an XSLT processor chew
>>>for several minutes on a very predictable document (granted, it's
>>>Java based, but still) I think that if it had access to schema
>>>information it could optimize a lot of what it's doing by skipping
>>>entire subtrees.

One thing I don't understand about this idea: what if the document is 
invalid according to its schema? Is schema checking a prerequisite 
for using the schema (which would seem to be a huge performance hit 
in itself) or does the processor simply produce incorrect results in 
this case?
-- 

+-----------------------+------------------------+-------------------+
| Elliotte Rusty Harold | elharo@m... | Writer/Programmer |
+-----------------------+------------------------+-------------------+
|          XML in a  Nutshell, 2nd Edition (O'Reilly, 2002)          |
|              http://www.cafeconleche.org/books/xian2/              |
|  http://www.amazon.com/exec/obidos/ISBN%3D0596002920/cafeaulaitA/  |
+----------------------------------+---------------------------------+
|  Read Cafe au Lait for Java News:  http://www.cafeaulait.org/      |
|  Read Cafe con Leche for XML News: http://www.cafeconleche.org/    |
+----------------------------------+---------------------------------+

• Follow-Ups:
  • Re: XPath/XSLT 2.0 concerns
    • From: Robin Berjon <robin.berjon@e...>

• References:
  • Re: XPath/XSLT 2.0 concerns
    • From: Mike Champion <mc@x...>
  • Re: XPath/XSLT 2.0 concerns
    • From: Jeni Tennison <jeni@j...>
  • Re: XPath/XSLT 2.0 concerns
    • From: Tim Bray <tbray@t...>
  • Re: XPath/XSLT 2.0 concerns
    • From: Paul Prescod <paul@p...>
  • Re: XPath/XSLT 2.0 concerns
    • From: Robin Berjon <robin.berjon@e...>
  • Re: XPath/XSLT 2.0 concerns
    • From: Jeni Tennison <jeni@j...>
  • Re: XPath/XSLT 2.0 concerns
    • From: Robin Berjon <robin.berjon@e...>

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