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RE: XQuery -- Reinventing the Wheel?
- From: Uche Ogbuji <email@example.com>
- To: Kimbro Staken <firstname.lastname@example.org>
- Date: Wed, 21 Feb 2001 19:35:04 -0700 (MST)
> Uche Ogbuji wrote:
> > Not a problem as far as XSLT qua XSLT. But once you rely on this property
> > for standardized treatment of a grove (term loosely used), which is what
> > it seems your XSLT-base dproposal would do, I think you'd need to have
> > strict prescription of the mapping from multiple documents to XSLT source
> > for this not to be problematic. Maybe you already do so in your paper,
> > which would, I think, cover my concerns.
> I'd think this to be a minor point really.
Course it is.
> I believe Evan's major point
> is just that the majority of XQuery syntax can be easily mapped to XSL-T
> and that creating an entirely new syntax may not be the proper thing to
That's how I understood it at first as well. What, I think threw things
off a bit for me was the following exchange:
"I have been given to understand that XQuery supports searches across a
collection of XML documents and XPath does not. Are you saying that
this understanding is incorrect?"
"This is correct, but XSLT already extends the XPath model to support
non-well-formed source trees. Thus, the XQuery "ordered forest" is very
much like the XSLT data model."
Now I'm guessing at what Bob meant, but as I read that question, the
simple answer is document() and not some minor arcana of the XSLT spec.
My talk of thin ice was precisely making the point that I hoped such
minutiae were not the basis of the argument against XQuery's re-inventing
the wheel. As I think you, Evan and I all agree, the main point is that
XSLT provides the general machinery for document query across documents.
All I think would be needed in XQuery is a formalization of document
collections and some unification of data models across the various facets
of XML (XPath, DOM, SAX, XLink [note linkbases]), etc., where query proves
useful. And finally a few primitives based on XSLT extensions for
specialized and efficient query calculus.
XQuery could be a very small and very familiar spec.
Uche Ogbuji Principal Consultant
email@example.com +1 303 583 9900 x 101
Fourthought, Inc. http://Fourthought.com
4735 East Walnut St, Ste. C, Boulder, CO 80301-2537, USA
Software-engineering, knowledge-management, XML, CORBA, Linux, Python