- From: <noah_mendelsohn@us.ibm.com>
- Date: Fri, 31 May 2002 14:35:49 -0400
- To: Sean Morris <semorris@cisco.com> (by way of "C. M. Sperberg-McQueen" <<semorris@cisco.com<semorris>), <xmlschema-dev@w3.org>
Sean Morris suggests (on the schema comments list...I've moved here so we
can discuss):
>> Add support for defining multiple ranges for integers.
>> For example an integer element can be 0, 5-7, 10-15, etc.
Sean: there are many such capabilities that we might consider adding to
what is already a complex spec. Each such feature is a bit more for users
to learn and understand, a bit more to model in components, and more for
which to write test cases. So, we usually try to make the case that a new
feature is either of great use to a broad range of users, or more rarely,
of very great importance to a smaller set of users. Do you have
implementation experience to suggest that multiple ranges meets an 80/20 or
90/10 cut?
Also: we have to think about the rules for refinement. Can:
Integer [5-10, 11-15]
be refined to
Integer [7-12]?
Keep in mind that integer is a subtype of decimal and presumably:
Decimal [5.0-10.0, 11.0-15.0]
is not a refinement of
Decimal [7.0-12.0]? (this allows 10.5 and the base type does not?
Is the component representation of
Integer [5-10, 11-15]
distinct from
Integer [5-15]?
One thing we've all learned in doing schemas is that there is rarely such a
thing as a simple, cheap, or safe feature. Can you make the case that the
need for the feature request is sufficiently urgent that the moderate
additional complexity is justified? Many thanks.
------------------------------------------------------------------
Noah Mendelsohn Voice: 1-617-693-4036
IBM Corporation Fax: 1-617-693-8676
One Rogers Street
Cambridge, MA 02142
------------------------------------------------------------------
Sean Morris
<semorris@cisco.com> (by To: W3C XML Schema Comments list <www-xml-schema-comments@w3.org>
way of "C. M. cc: (bcc: Noah Mendelsohn/Cambridge/IBM)
Sperberg-McQueen" <cmsmcq Subject: XML Schemas
Sent by:
www-xml-schema-comments-req
uest@w3.org
05/30/2002 08:38 PM
Add support for defining multiple ranges for integers. For example an
integer element can be 0, 5-7, 10-15, etc.
Thanks,
Sean
Received on Friday, 31 May 2002 14:54:07 UTC