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   RE: [xml-dev] FW: [ANN]: XQuery: A Guided Tour

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  • To: "Rick Jelliffe" <ricko@allette.com.au>,<xml-dev@lists.xml.org>
  • Subject: RE: [xml-dev] FW: [ANN]: XQuery: A Guided Tour
  • From: "Dare Obasanjo" <dareo@microsoft.com>
  • Date: Tue, 30 Sep 2003 08:35:13 -0700
  • Thread-index: AcOHZ+X0uyHCxUL/Rfy8w0p0vRDZ2AAAIrG5
  • Thread-topic: [xml-dev] FW: [ANN]: XQuery: A Guided Tour

interesting == type annotations 
As for derivation of complex types, you'll probably appreciate the article I just sent to XML.com yesterday which should show up next month on this topic. 
PS: We should hang out at XML 2003 this year. 


From: Rick Jelliffe [mailto:ricko@allette.com.au]
Sent: Tue 9/30/2003 8:29 AM
To: xml-dev@lists.xml.org
Subject: Re: [xml-dev] FW: [ANN]: XQuery: A Guided Tour

Dare Obasanjo wrote:

>However RELAX NG doesn't even do infoset augmentation which is required
>for the XQuery type system to do anything interesting with it.
I think all that is required by the XQuery type system is type
annotations consistent
with the data model. A RELAX NG system could make type annotations;
there would
be no derived types (or only one level), but you could write an XML
Schema schema
like that too. (If the RELAX NG schema were unambiguous, it could be
used for
static checking too.)

What is "interesting"?  Surely not derivation of complex types, because
it is so
crippled as to be useless AFAIKS.

Rick Jelliffe

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