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Re: XML Chunk Equality

From: Norman Walsh <Norman.Walsh@Sun.COM>
Date: Tue, 26 Oct 2004 15:54:41 -0400
To: Elliotte Rusty Harold <elharo@metalab.unc.edu>
Cc: www-tag@w3.org
Message-id: <87lldti7b2.fsf@nwalsh.com>
/ Elliotte Rusty Harold <elharo@metalab.unc.edu> was heard to say:
| The finding states:
| Unordered lists (such as the [attributes] property) are compared
| pairwise but without respect to order. In other words, two unordered
| lists "A" and "B" are the same if and only if there exists a set of
| pairs of items, one from each list, such that the two items in each
| pair are equal and no item from "A" or "B" appears in more than one
| pair. It follows that they can only be the same if they are the same
| length.
| I don't think this is quite correct. I agree with the intent but the
| wording seems off. In particular given set (A, B, C, D) and set (1, 2,
| 3, 4) I think the set of pairs {(A, 1)} could satisfy this if A and 1
| are equal even though B, C, D do not equal any of 2, 3, 4. To fix this
| I think you need the additional constraint that every item from A and
| B appears in exactly one pair rather than " no item from "A" or "B"
| appears in more than one pair."

Indeed. Thanks.

                                        Be seeing you,

Norman.Walsh@Sun.COM / XML Standards Architect / Sun Microsystems, Inc.
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Received on Tuesday, 26 October 2004 19:54:47 UTC

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