Re: XPath 2.0: Conditional Expression (Was Re: XQuery
Thanks for this note, as well. I'm responding to the 2 notes separately because the subject matter and the response are both significantly different.
At 05:46 PM 9/7/2001 +0100 Friday, Jeni Tennison wrote:
Another XPath 2.0 requirement that doesn't seem to be present in the F&O WD is 2.2 "Must Provide a Conditional Expression". I imagined that conditional expressions would be supported with an operator, something like:
The XQuery 1.0 (surface syntax) working draft has an expression that I think is isomorphic to the example you cited. The syntax is different, but it is an *expression* that returns a value. In the June 7, 2001 draft, it appears in section 2.6, "Conditional Expressions". You can find the most recent version of this document at: http://www.w3.org/TR/xquery (I know that you know how to find it, but there may be other readers who do not).
There is on-going discussion about the best way to partition operators, functions, etc. between various documents. The two ends of the spectrum are (a)Put ever conceivable operator, function, etc. into the F&O document, versus (b)Merge the F&O document with one or more other documents (e.g., XQuery, Formal Semantics, etc.; perhaps merging one or more of those documents together as well). It's too soon to guess how those discussions will end, but I will comment here that I am extremely sensitive to the issue of inter-document complexities!
Hope this helps, Jim ======================================================================== Jim Melton --- Editor of ISO/IEC 9075-* (SQL) Phone: +1.801.942.0144 Oracle Corporation Oracle Email: mailto:jim.melton@xxxxxxxxxx 1930 Viscounti Drive Standards email: mailto:jim.melton@xxxxxxx Sandy, UT 84093-1063 Personal email: mailto:jim.melton@xxxxxxx USA Fax : +1.801.942.3345 ======================================================================== = Facts are facts. However, any opinions expressed are the opinions = = only of myself and may or may not reflect the opinions of anybody = = else with whom I may or may not have discussed the issues at hand. = ========================================================================
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