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Re: Element names

From: <Noah_Mendelsohn@lotus.com>
Date: Mon, 4 Dec 2000 18:14:24 -0500
To: Daniel Acton <dacton@itouch.co.za>
Cc: xmlschema-dev@w3.org
Message-ID: <OFC2FFC98A.DA9C88CF-ON852569AB.007FCACE@lotus.com>
You might find what you need in substitution groups [1] and [2].  You 
might find that by making a substitution group <waysOfGettingAround> that 
includes both <stroll> and <walk> (and perhaps others), that you can do 
what you want.   Within limits, you can provide for a controlled 
relationship on the types of <stroll> and <walk>, but you need to be 
careful with the declaration of the type for <waysOfGettingAround> itself. 
 See the references below for the details.

Please do let us know if this mechanism meets your needs, as we are trying 
to judge the effectiveness of our design.

[1] http://www.w3.org/TR/xmlschema-0/#SubsGroups
[2] http://www.w3.org/TR/xmlschema-1/#key-equivalenceClass

------------------------------------------------------------------------
Noah Mendelsohn                                    Voice: 1-617-693-4036
Lotus Development Corp.                            Fax: 1-617-693-8676
One Rogers Street
Cambridge, MA 02142
------------------------------------------------------------------------







Daniel Acton <dacton@itouch.co.za>
Sent by: xmlschema-dev-request@w3.org
12/02/00 01:56 PM

 
        To:     xmlschema-dev@w3.org
        cc:     (bcc: Noah Mendelsohn/CAM/Lotus)
        Subject:        Element names


Hi.

I am trying to make an xmlschema to vaalidate different instances of an
xml document. Do I have to explicitly name the elements in the schema, or
can I make an element be recognised by it's attributes. Here's a scenario:

--First instance--
<Dog>
  <sleep time="10" energy="5joules"/>
  <walk time="10km" energy="10joules"/>
  ...
</Dog>

--Second instance--
<Cat>
  <sleep time="25" energy="14joules"/>
  <stroll distance="2km" energy="50joules"/>
  ...
</Cat>


--Schema--

<xsd:element name="sleep" type="activityType"/>
<xsd:element name="walk" type="activityType"/>

<xsd:complexType="activityType">
  <xsd:attribute name="distance" type="xsd:string"/>
  <xsd:attribute name="energy" type="xsd:string"/>
</xsd:complexType>


The above schema, I assume, and once again am standing to correction,
would validate the first instance, but not the second. I have tried
something similar, and have received the following: 
 > Element 'stroll' not expected

Is there a way I can tell the schema to expect an element with those
attributes, but not explicitly state the name?

Thank you in advance
Daniel
Received on Monday, 4 December 2000 18:22:32 GMT

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