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   RE: Repeating attribute specifications

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  • From: Paul Grosso <paul@arbortext.com>
  • To: xml-dev@ic.ac.uk
  • Date: Thu, 12 Jun 1997 17:48:55 -0400

At 18:53 1997 06 12 GMT, Peter Murray-Rust wrote:
>I assumed that the multiple attributes was so that if (say) 
>occurs in the external DTD and
>occurs in the internal subset
>then this is now legal whereas it wasn't before.  But what is now the default
>value of BAR? I assumed it was the later declaration ("XYZZY").  Please
>disabuse me if this is wrong. 

Your answer seems to be in 3.3 of the XML-lang spec:

When more than one AttlistDecl is provided for a given element type, the 
contents of all those provided are merged. When more than one definition is 
provided for the same attribute of a given element type, the first 
declaration is binding and later declarations are ignored. For 
interoperability, writers of DTDs may choose to provide at most one 
attribute-list declaration for a given element type, and at most one 
attribute definition for a given attribute name. An XML processor may, at 
user option, issue a warning when more than one attribute-list declar ation 
is provided for a given element type, or more than one attribute definition 
for a given attribute, but this is not an error. 

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