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RE: delimiter for list items

From: by way of <xiaotaow@cs.columbia.edu>
Date: Tue, 03 Sep 2002 11:04:07 -0600
Message-Id: <5.1.0.14.1.20020903110400.04a7dbf0@localhost>
To: W3C XML Schema Comments list <www-xml-schema-comments@w3.org>




On Wed, 21 Aug 2002, Ashok Malhotra wrote:

 > As Paul Biron pointed out, XML Schema currently does not allow any
 > delimiter other than whitespace.  You may find the tokenize function
 > in the Functions and Operators spec useful for your needs. See
 > http://www.w3.org/TR/2002/WD-xquery-operators-20020816/#func-tokenize

Hi, Ashok,

Thank you for the suggestion! However, that function is to convert a
string, not to be used in a schema for type definition.
I know that Schema v1.0 does not support any delimiter other than
whitespace, but for v1.1, is it possible to add another constraining facet
'delimiter' for the list datatype.

Thanks!

-Xiaotao

 >
 > All the best, Ashok
 > ===========================================================
 > Ashok Malhotra              <mailto: ashokma@microsoft.com>
 > Microsoft Corporation
 > 212 Hessian Hills Road
 > Croton-On-Hudson, NY 10520 USA
 > Redmond: 425-703-9462                New York: 914-271-6477
 >
 >
 >
 > -----Original Message-----
 > From: Xiaotao Wu [mailto:xiaotaow@cs.columbia.edu]
 > Sent: Monday, August 19, 2002 7:59 AM
 > To: W3C XML Schema Comments list
 > Subject: RE: delimiter for list items
 >
 >
 >
 >
 >
 > I encountered the delimiter problem when I was trying to convert the DTD
 > of CPL (Call Processing Language) to XML Schema. There is an attribute
 > bySeconds, the type of the attribute is a list of number, separated by
 > comma. The reason of using comma as the delimiter for this attribute is
 > to
 > follow the IETF RFC 2445 (Internet Calendaring and Scheduling Core
 > Object Specification). In the Section 4.1.1 of the RFC, it mentions:
 >
 > 4.1.1 List and Field Separators
 >
 >     Some properties and parameters allow a list of values. Values in a
 >     list of values MUST be separated by a COMMA character (US-ASCII
 >     decimal 44). There is no significance to the order of values in a
 >     list. For those parameter values (such as those that specify URI
 >     values) that are specified in quoted-strings, the individual quoted-
 >     strings are separated by a COMMA character (US-ASCII decimal 44).
 >
 > -Xiaotao
 >
 > On Fri, 16 Aug 2002, Biron,Paul V wrote:
 >
 >  > > -----Original Message-----
 >  > > From:	Xiaotao Wu [SMTP:xiaotaow@cs.columbia.edu]
 >  > > Sent:	Thursday, August 15, 2002 6:21 PM
 >  > > To:	W3C XML Schema Comments list
 >  > > Subject:	delimiter for list items
 >  > >
 >  > > The Schema 1.0 only allows whitespace as the delimiter for the
 > items.
 >  > > However, many existing scripts allow other delimiters, such as ',',
 > ':'.
 >  > > It may be useful to allow users to define the delimiter in a list.
 >  > >
 >  > During the development of the schema rec I presented a proposal to
 > the
 > WG to allow user defined delimiters.  The WG felt that the feature would
 >
 > add to the complexity of the spec/implementations and decided not to
 > include it.  In the scope of schema v1.1 I don't think the WG will feel
 > this feature is important enough, but there is some chance of it making
 > its
 > way into schema v2.
 >  >
 >  > To help that happen, can you provide a specific use case as to why
 > the
 > feature "may be useful"?
 >  >
 >  > pvb
 >  >
 >
 > -Xiaotao
 >
 > =========================================================
 > Name  : Xiaotao Wu
 > Email : xiaotaow@cs.columbia.edu, xw71@columbia.edu
 > URL   : http://www.cs.columbia.edu/~xiaotaow
 > Phone : (212)939-7020, (212)939-7133,  Fax: (801)751-0217
 > SIP   : sip:xiaotaow@conductor.cs.columbia.edu
 > Office: Room 463, Mudd building, West 120th
 > =========================================================
 >

-Xiaotao

=========================================================
Name  : Xiaotao Wu
Email : xiaotaow@cs.columbia.edu, xw71@columbia.edu
URL   : http://www.cs.columbia.edu/~xiaotaow
Phone : (212)939-7020, (212)939-7133,  Fax: (801)751-0217
SIP   : sip:xiaotaow@conductor.cs.columbia.edu
Office: Room 463, Mudd building, West 120th
========================================================= 
Received on Tuesday, 3 September 2002 13:05:17 GMT

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