- From: Priscilla Walmsley <priscilla@walmsley.com>
- Date: Wed, 20 Nov 2002 10:47:10 -0500 (EST)
- To: <public-qt-comments@w3.org>
A few comments on the distinct-values function: 1. Why does it matter if two values of the same type have a total order, as long as they can be compared using eq? For example, QNames do not have total order but you should be able to pick out distinct ones using the eq/ne operators. It seems like only duration would be a problem here. 2. I'm assuming that xs:integer(1) and xs:decimal(1.0) are not distinct values (or are they?) Should the rec specify which type the returned value should have? If not, maybe there should be a note about that being implementation dependent. 3. How should anySimpleType values be handled? Using the eq operator results in an anySimpleType value being cast to the type of the other operand. It seems logical that if the sequence is (xs:integer("3"), <x>3</x>), distinct-values should only return one value (3), but what if it is (xs:integer("3"), <x>3.0</x>, <x>3</x>). Should that return one, two, or three values? This should be clarified. 4. NaN is not equal to itself using the eq operator, so should it really be equal to itself for the purposes of this function? 5. There is no need to make a special point about 0.0 being equal to -0.0, since this is the behavior of the numeric-equal function. 6. In the last sentence of the first paragraph, the comma appears to be in the wrong place and "a implicit" should say "an implicit" Also, the sentence starting with "Equality of string values are..." should be "Equality of string values is..." Thanks, Priscilla
Received on Wednesday, 20 November 2002 11:21:49 UTC