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RE: Simple question on elements constraints

From: Morris Matsa <mmatsa@us.ibm.com>
Date: Tue, 23 Jan 2001 15:51:52 -0500
To: "David E. Cleary" <davec@progress.com>
Cc: "Adalbert Wysocki" <waldi@imediation.com>, <ht@cogsci.ed.ac.uk>, <xmlschema-dev@w3.org>
Message-ID: <OF23440C31.09D5ED41-ON852569DD.0071C811@somers.hqregion.ibm.com>


I think that instead you should restrict integer with a pattern.  The
problem with minInclusive and maxInclusive, or even enumeration, is that
they restrict only the value space, which means that people are still
allowed to use <id>03000</id>, <id>+3000</id>, etc. where it seems that the
desire here is just to allow the string "3000".  If any forms of the value
"3000" are allowed, then restriction of integer with a single enumeration
would be fine.

Morris


"David E. Cleary" <davec@progress.com>@w3.org on 01/23/2001 03:12:56 PM

Sent by:  xmlschema-dev-request@w3.org


To:   "Adalbert Wysocki" <waldi@imediation.com>, <ht@cogsci.ed.ac.uk>
cc:   <xmlschema-dev@w3.org>
Subject:  RE: Simple question on elements constraints




Then  the fixed attribute isn't what you want. Instead, create a type that
is a  restriction of integer and has minInclusive and maxInclusive set to
3000.

David  Cleary
Progress Software
-----Original Message-----
From: xmlschema-dev-request@w3.org  [mailto:xmlschema-dev-request@w3.org]On
Behalf Of Adalbert  Wysocki
Sent: Tuesday, January 23, 2001 2:48 PM
To:  ht@cogsci.ed.ac.uk
Cc: xmlschema-dev@w3.org
Subject: RE:  Simple question on elements constraints



I cannot remove the 'fixed' attribute or must replace it with  something
else because the value of the element 'id' must be 3000 and in the  same
time cannot be empty.

-----Original Message-----
From:  ht@cogsci.ed.ac.uk [mailto:ht@cogsci.ed.ac.uk]
Sent: Tuesday, January 23, 2001 8:33 PM
To: Adalbert Wysocki
Cc:  xmlschema-dev@w3.org
Subject: Re: Simple question on  elements constraints

Adalbert Wysocki <waldi@imediation.com> writes:

> Hi all,
> I have a very simple  question but it better to ask experienced people
rather
> than write dirty thinks.
> The context  is the validation of XML documents using XMLSchema.
> How can I specify that an element must have a fixed value and  cannot
have an
> empty one.
>
> example:
>  -------
> <?xml version="1.0"?>
> <contract>
>    <id></id>
> </contract>
>
> This document is not valid  because the element 'id' is empty whereas it
should
> be filled with a value and this value equals for example  '3000'.
>
> I tryed  following:
> .....
>  <xsd:element name="id" type="noEmptyElement" fixed="3000"/>
> ....
> <xsd:simpleType  name="noEmptyElement">
>    <xsd:restriction base="xsd:string">
>      <minLength value="1"/>
>    </xsd:restriction>
>  </xsd:simpleType>

Just remove the fixed="3000" and you'll have what you  want.

ht
--
   Henry S. Thompson, HCRC Language Technology Group, University of
Edinburgh
          W3C Fellow  1999--2001, part-time member of W3C Team
     2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND  -- (44) 131 650-4440
             Fax: (44) 131 650-4587, e-mail:  ht@cogsci.ed.ac.uk
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Received on Tuesday, 23 January 2001 15:53:25 GMT

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