[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

Re: The use of XML syntax in XML Query

• To: "Champion, Mike" <Mike.Champion@S...>,<www-xml-query-comments@w...>,<xml-dev@l...>
• Subject: Re: The use of XML syntax in XML Query
• From: "Dare Obasanjo" <kpako@y...>
• Date: Fri, 4 Jan 2002 06:26:47 -0800
• References: <9A4FC925410C024792B85198DF1E97E4021BDE54@u...>

----- Original Message -----
From: "Champion, Mike" <Mike.Champion@S...>
To: <www-xml-query-comments@w...>; <xml-dev@l...>
Sent: Thursday, January 03, 2002 2:23 PM
Subject: RE:  The use of XML syntax in XML Query
>
> Strong typing - There is a real-world use case for ensuring that queries
> return schema-valid results, for example ensuring that they can be displayed
> in valid XHTML.  (Whether anyone outside the W3C cares about schema-valid
> XHTML is another matter, but it is a "real world" example that I'm sure has
> counterparts with more data-oriented schemas in the REAL real world).  Doing
> this is a hard, but solveable problem, and solving it requires that XPath
> 2.0 and XQuery be designed as a unit, even if they are layered once
> everything is done.  Thus, "declaring victory" on XPath 2.0 without solving
> this problem is essentially declaring defeat on some matters near and dear
> to XQuery, since it is very unlikely that they could be solved in XQuery
> without changing XPath.
>


I'm still waiting for someone with a theoretical background to debunk the
statements in the paper "On Database Theory and XML"[0] that it is is an
unsolvable problem to guarantee that one can create a query that for any given
XML input will generate output that conforms to a specified XML schema.

[0] http://www.cs.washington.edu/homes/suciu/files/_F2066943700.ps

--
THINGS TO DO IF I BECOME AN EVIL OVERLORD #35
I will not grow a goatee. In the old days they made you look diabolic. Now
they just make you look like a disaffected member of Generation X.


_________________________________________________________
Do You Yahoo!?
Get your free @yahoo.com address at http://mail.yahoo.com

• Follow-Ups:
  • JAXP's ID Transform failing to include namespace declarationattributes
    • From: Elliotte Rusty Harold <elharo@m...>

• References:
  • RE: The use of XML syntax in XML Query
    • From: "Champion, Mike" <Mike.Champion@S...>

• Prev by Date: Re: XML Parsing using DOM parser
• Next by Date: RE: The use of XML syntax in XML Query
• Previous by thread: RE: The use of XML syntax in XML Query
• Next by thread: JAXP's ID Transform failing to include namespace declarationattributes
• Index(es):
  • Date
  • Thread