W3C home > Mailing lists > Public > xmlschema-dev@w3.org > February 2006

Re: elements type attribute question

From: Sandy Gao <sandygao@ca.ibm.com>
Date: Fri, 3 Feb 2006 09:45:46 -0500
To: "Natarajan Ravi" <Ravi.Natarajan@cfh.nhs.uk>
Cc: xmlschema-dev@w3.org
Message-ID: <OF344CA1F4.53FB93B2-ON8525710A.0050E37B-8525710A.00511C3C@ca.ibm.com>
Short answer: not allowed.

Medium answer: why? How do you determine which type to use?

Long answer: declare a base type, and derive all your choice types from 
that base. Use the base type in the element declaration. Use xsi:type in 
your instance to indicate which type to use for validation.

Sandy Gao
XML Parser Development, IBM Canada
(1-905) 413-3255

xmlschema-dev-request@w3.org wrote on 02/03/2006 03:53:17 AM:

>     I would like have an element declaration whose "type" is a 
> choice (1..n) other complex types. <xs:element name="test" 
> type="ComplexType_1 | Complex_Type_2" />.  Effectively I would like 
> to dynamically decide type at declaration stage which is a choice.
> Regards
> Ravi
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Received on Friday, 3 February 2006 15:17:02 UTC

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