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RE: Is possible to have choice type facility for an attribute

• To: "Baisak, Ranjan" <ranjan_baisak@m...>, "Michael Kay" <mike@s...>, "XML Developers List" <xml-dev@l...>
• Subject: RE: Is possible to have choice type facility for an attribute of schema
• From: "Chiusano Joseph" <chiusano_joseph@b...>
• Date: Tue, 8 Mar 2005 07:28:46 -0500
• Thread-index: AcUjrwhOcOKRuKS0TwehKLYEmdQrywAD5dDwAAAcwtAABs0FsA==
• Thread-topic: Is possible to have choice type facility for an attribute of schema

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From: Baisak, Ranjan [mailto:ranjan_baisak@m...]
Sent: Tuesday, March 08, 2005 4:19 AM
To: Michael Kay; XML Developers List
Subject: RE: Is possible to have choice type facility for an attribute of schema

In my schema, the same element can have diffenet view.

e.g. <a id="123" name="test"/>
<a id="123" view="true"/>
<a id="123" alt="true"/>

 

I am not interested to make name, view and alt attributes optional. One of these attributes must be there in <a> element. Which necessiates me for looking into a choice kind of functionality.

regards,
-Ranjan

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From: Michael Kay [mailto:mike@s...]
Sent: Tuesday, March 08, 2005 2:42 PM
To: Baisak, Ranjan; 'XML Developers List'
Subject: RE: Is possible to have choice type facility for an attribute of schema

Sadly, no.

 

I've never quite understood why: XML Schema when to a lot of efforts to make elements and attributes symmetric, but they are handled quite differently in content models.

 

Michael Kay

http://www.saxonica.com/

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From: Baisak, Ranjan [mailto:ranjan_baisak@m...]
Sent: 08 March 2005 07:19
To: XML Developers List
Subject: Is possible to have choice type facility for an attribute of schema

Like the way choice is applied for an element, I want same type of functionality for attributes too.

I want sort of like below:

 

<xsd:element name="name">
  <xsd:complexType>
   <xsd:choice>
   <xsd:attribute name="operator" type="OperatorType" default="EQUALS" use="required"/>
   <xsd:attribute name="value" type="xsd:string" use="required"/>
   </xsd:choice>
  </xsd:complexType>
 </xsd:element>

 

regards,

Ranjan

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