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RE: XPath and XPattern (was Re: More on tamingSAX)

• To: Michael Kay <mike@s...>
• Subject: RE: XPath and XPattern (was Re: More on tamingSAX)
• From: Uche Ogbuji <Uche.Ogbuji@f...>
• Date: Thu, 23 Dec 2004 22:10:12 -0700
• Cc: 'David Megginson' <david.megginson@g...>,xml-dev@l...
• In-reply-to: <E1ChXnb-0004PJ-00@u...>
• Organization: Fourthought, Inc.
• References: <E1ChXnb-0004PJ-00@u...>

On Thu, 2004-12-23 at 18:34 +0000, Michael Kay wrote:
> > Thanks again to Uche for the clarification (I already thanked him
> > privately) -- I either never knew or have completely forgotten the
> > term "XPattern" for an XSLT pattern, but I wasn't much involved with
> > the XSL people in the late 1990s.
> > 
> > Perhaps the term 'XPattern' would be safe to reuse for a
> > SAX/STAX-friendly XPath subset, then?  That's what I had originally
> > (and mistakenly) thought Uche was writing about.
> 
> Uche: are your XPatterns full XSLT patterns?

No.  Well, to be clear, 4Suite implements full XSLT patterns, but
Tenorsax only works with a subset of that.


> That is, can they include any
> XPath expression within a predicate? Or are they more like the subset of
> XPath used in XML Schema uniqueness constraints, which is designed for
> serial on-the-fly evaluation and doesn't allow predicates at all?

I expect Tenorsax will always be a forwards-only subset.


-- 
Uche Ogbuji                                    Fourthought, Inc.
http://uche.ogbuji.net    http://4Suite.org    http://fourthought.com
Use CSS to display XML - http://www.ibm.com/developerworks/edu/x-dw-x-xmlcss-i.html
Full XML Indexes with Gnosis - http://www.xml.com/pub/a/2004/12/08/py-xml.html
Be humble, not imperial (in design) - http://www.adtmag.com/article.asp?id=10286
UBL 1.0 - http://www-106.ibm.com/developerworks/xml/library/x-think28.html
Use Universal Feed Parser to tame RSS - http://www.ibm.com/developerworks/xml/library/x-tipufp.html
Default and error handling in XSLT lookup tables - http://www.ibm.com/developerworks/xml/library/x-tiplook.html
A survey of XML standards - http://www-106.ibm.com/developerworks/xml/library/x-stand4/
The State of Python-XML in 2004 - http://www.xml.com/pub/a/2004/10/13/py-xml.html

• References:
  • RE: XPath and XPattern (was Re: More on taming SAX)
    • From: "Michael Kay" <mike@s...>

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