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RE: XQuery Risk Assessment

From: Michael Brundage <xquery@comcast.net>
Date: Tue, 22 Jul 2003 22:28:01 -0700
To: "'Howard Katz'" <howardk@fatdog.com>, "'dwight funk'" <dfunk@powerwayinc.com>, <www-ql@w3.org>
Message-ID: <000001c350db$2fe2d2c0$6501a8c0@xpider>
You should watch the public-qt-comments alias; plenty of activity there.
Hundreds of last call comments on the Data Model and F&O alone.
 
There are some parts of the current working drafts that are very likely to
change:
- semantics of modules (new in the May 2 draft)
- serialization (new in the May 2 draft)
- semantics of construction (e.g., implicit validation is new in the May 2
draft)
- xdt:dayTimeDuration, xdt:yearMonthDuration, and all functions that work
with date/time types
- changes to some function definitions
- various type system-related issues (implicit conversions, validation,
untypedAtomic vs. anySimpleType vs. anyType, etc.)
 
Otherwise, the current drafts do seem pretty stable.  However, every
publicly available implementation I've tested differs from the current
drafts in major areas.
 
Having watched this area closely for the past two years, my opinion is that
implementations will continue to lag behind the drafts by at least six
months from now until XQuery is done, and also that a production-quality
implementation of XQuery (matching, say, the current best-of-class XSLT
implementations in robustness and performance) is at least 6-12 months away.
If your development schedule can accomodate that, then you should be fine.
If you need something sooner, then you should seriously consider existing
technologies.
 
 
Cheers,
 
Michael Brundage
xquery@comcast.net

Writing as
Author, "XQuery: The XML Query Language" (Addison-Wesley, to appear 2003)
Co-author, "Professional XML Databases" (Wrox Press, 2000)

not as
Technical Lead
Common Query Runtime/XML Query Processing
WebData XML Team
Microsoft

 
 
-----Original Message-----
From: www-ql-request@w3.org [mailto:www-ql-request@w3.org] On Behalf Of
Howard Katz
Sent: Tuesday, July 22, 2003 2:40 PM
To: dwight funk; www-ql@w3.org
Subject: RE: XQuery Risk Assessment



No major tectonic plate movement in sight. I'd recommend anybody's query
engine but my own. :-)
Howard

-----Original Message-----
From: www-ql-request@w3.org [mailto:www-ql-request@w3.org]On Behalf Of
dwight funk
Sent: Tuesday, July 22, 2003 1:19 PM
To: www-ql@w3.org
Subject: XQuery Risk Assessment




I've been asked to make a risk assessment of becoming an early adopter of
XQuery based technologies. 

I've been watching this lists for a while now and the activity seems to be
relatively low. This implies to me the risk is low and the current working
draft is pretty stable.

Can anyone provide opinions or observations? 

Dwight Funk 
Software Architect - XML Technologies 
POWERWAY, Inc. 
(317) 598-6745 

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Received on Wednesday, 23 July 2003 01:27:45 UTC

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