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Re: Uniqueness of attribute names

From: Robin LaFontaine <robin@monsell.co.uk>
Date: Wed, 16 Aug 2000 10:14:37 +0100
Message-Id: <v0421010ab5c00b98efaf@[158.152.20.130]>
To: www-xml-schema-comments@w3.org
I send this in in case Dan was not able to do this, so that it is not lost!

Please could I have some acknowledgement that it has been received?
Thanks
Robin

>Resent-Date: Fri, 11 Aug 2000 07:31:25 -0400 (EDT)
>X-Sender: monsell@pop3.demon.co.uk
>Date: Fri, 11 Aug 2000 10:07:38 +0100
>To: Dan Connolly <connolly@w3.org>, www-xml-schema-comments@w3.org
>From: Robin LaFontaine <robin@monsell.co.uk>
>Cc: xmlschema-dev@w3.org
>Subject: Re: Uniqueness of attribute names
>Resent-From: xmlschema-dev@w3.org
>X-Mailing-List: <xmlschema-dev@w3.org> archive/latest/144
>X-Loop: xmlschema-dev@w3.org
>Sender: xmlschema-dev-request@w3.org
>Resent-Sender: xmlschema-dev-request@w3.org
>
>Dan,
>
>Thanks for your response. As this appears to be a bug, here is my 
>full list of what is missing, and if you have any 
>comments/disagreements please let me know! The background is that I 
>am writing a comparator for XML Schemas, that is software to compare 
>two schemas and indicate the differences. So it needs to know when 
>items are ordered and what their keys are.
>
>I will assume that you will circulate this to 
>www-xml-schema-comments@w3.org as soon as our discussion is 
>concluded.
>
>Within ELEMENT all:
>
><key name="all.element">
> <selector>element</selector>
> <field>@name|@ref</field>
></key>
><key name="all.group">
> <selector>group</selector>
> <field>@name|@ref</field>
></key>
>
>
>Within ELEMENT attributeGroup:
>
><key name="attributeGroup.attribute">
> <selector>attribute</selector>
> <field>@name|@ref</field>
></key>
><key name="attributeGroup.attributeGroup">
> <selector>attributeGroup</selector>
> <field>@name|@ref</field>
></key>
>
>
>Within ELEMENT choice:
>
><key name="choice.element">
> <selector>element</selector>
> <field>@name|@ref</field>
></key>
><key name="choice.group">
> <selector>group</selector>
> <field>@name|@ref</field>
></key>
>
>Within ELEMENT complexType:
>
><key name="complexType.attribute">
> <selector>attribute</selector>
> <field>@name|@ref</field>
></key>
><key name="complexType.attributeGroup">
> <selector>attributeGroup</selector>
> <field>@name|@ref</field>
></key>
>
>Robin
>
>At 1:13 pm -0500 10/8/00, Dan Connolly wrote:
>>Robin LaFontaine wrote:
>> >
>> > In the element named 'schema' in the definition of XML Schema, there
>> > is a constraint:
>> >
>> >     <key name="attribute">
>> >      <selector>attribute</selector>
>> >      <field>@name</field>
>> >     </key>
>> >
>> > which indicates that the 'name' attribute is a key for the element
>> > called attribute.
>> >
>> > Why is there not a corresponding constraint within the element named
>> > 'complexType' (and indeed in attributeGroup) in order to constrain
>> > all its attributes to have different names?
>>
>>Looks like an oversight, i.e. a bug in the spec. I'm copying
>>www-xml-schema-comments@w3.org.
>>
>>
>>--
>>Dan Connolly, W3C http://www.w3.org/People/Connolly/
>
>-- -----------------------------------------------------------------
>Robin La Fontaine, Monsell EDM Ltd
>(R&D Project Management, Engineering Data Exchange using XML, EDIF)
>Tel: +44 1684 592 144 Fax: +44 1684 594 504 or +44 870 054 2811
>Email: robin@monsell.co.uk       http://www.monsell.co.uk

-- -----------------------------------------------------------------
Robin La Fontaine, Monsell EDM Ltd
(R&D Project Management, Engineering Data Exchange using XML, EDIF)
Tel: +44 1684 592 144 Fax: +44 1684 594 504 or +44 870 054 2811
Email: robin@monsell.co.uk       http://www.monsell.co.uk
Received on Wednesday, 16 August 2000 10:59:22 UTC

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