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Attributes and extension

From: Claude Seyrat <cseyrat@acland.fr>
Date: Wed, 03 Jan 2001 17:23:46 +0100
Message-ID: <3A535212.8E6F7118@acland.fr>
To: www-xml-schema-comments@w3.org

Dear All,

In case of an extension can we redefine an attribute in order to 
change its use or default value ?

In the proposed recommendations :

Constraint on Schemas: Derivation Valid (Extension) 
If the {derivation method} is extension: 
1.1 If the {base type definition} is a complex type definition: 
  1.1.1 The {final} of the {base type definition} must not contain 
             Its {attribute use pairs} must be a subset of the 
             {attribute use pairs} of the complex type definition 
             itself, that is, for every attribute use pair in the 
             {attribute use pairs} of the {base type definition}, 
             there must be a pair in the {attribute use pairs} of 
             the complex type definition itself whose attribute 
             declaration has the same {name}, {target namespace} and 
             {type definition} as its attribute declaration; 

		^^^^^^^^^^^ does it mean that we can change its 
               use and default value ?

Thank you very much.

Best regards,


Claude Seyrat

Expway c/o Acland
18 avenue Georges V
75008 Paris
tel: 33 1 56 62 11 05
fax: 33 1 56 62 11 11
mail: cseyrat@acland.fr
Received on Wednesday, 3 January 2001 11:31:11 UTC

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