W3C home > Mailing lists > Public > xmlschema-dev@w3.org > October 2000

Re: Dynamic Array

From: <Noah_Mendelsohn@lotus.com>
Date: Mon, 2 Oct 2000 14:49:43 -0400
To: Gwenael Treguier <gwenael_treguier@altavista.fr>
Cc: xmlschema-dev@w3.org
Message-ID: <OF01BBC2AB.E67C51D5-ON8525696C.00513356@lotus.com>
The features you are requesting are examples of what we call 
"co-occurrence constraints".  In other words, constraints imposed on one 
part of the instance data by appearance (or lack of appearance) of 
particular content elsewhere.  Of course, the fundamental DTD capabilities 
of sequence and choice give some co-occurrence constraints, but in general 
we have deferred consideration richer constraints until future  releases. 
We do recognize that they are potentially useful for a variety of purposes 
including some quite simple ones (e.g. either this element or that 
attribute can occur, but not both.)

Noah Mendelsohn                                    Voice: 1-617-693-4036
Lotus Development Corp.                            Fax: 1-617-693-8676
One Rogers Street
Cambridge, MA 02142
Received on Monday, 2 October 2000 14:54:31 UTC

This archive was generated by hypermail 2.4.0 : Friday, 17 January 2020 23:14:47 UTC