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[Bug 9196] Enumeration and NaN

From: <bugzilla@jessica.w3.org>
Date: Sat, 14 Aug 2010 00:00:51 +0000
To: www-xml-schema-comments@w3.org
Message-Id: <E1Ok4B9-0007Ic-6c@jessica.w3.org>
http://www.w3.org/Bugs/Public/show_bug.cgi?id=9196





--- Comment #2 from C. M. Sperberg-McQueen <cmsmcq@blackmesatech.com>  2010-08-14 00:00:50 ---
(Speaking for myself) I think the change is already mentioned.  The section on
numeric types (I.2) mentions that float and double are now more closely aligned
with IEEE mentions that NaN != NaN, and the section on "Other changes" (I.4)
notes that enumerations, identity constraints (sic!), and value constraints all
use equality not identity.  It seems to me that examples like the one shown in
the description automatically follow from those facts.  

So my instinct is to close this issue with a disposition of WORKSFORME.  

If the idea is to add a sentence pointing out that in cases of enumerations
including NaN and signed zero 1.1 and 1.0 processors may produce different
results, I suppose it may be possible to find suitable wording (though I am
skeptical).  But I think there is a limit to our ability to hold the reader's
hand on matters like this.  It is not feasible to enumerate all the logical
implications of our changes, and I do not think we should try.

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Received on Saturday, 14 August 2010 00:00:52 UTC

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