Repeating attribute specifications

David Schach davidsch at microsoft.com
Thu Jun 12 19:15:33 BST 1997


I think Tim misunderstood your question.  In the XML DTD, it is legal to
have multiple AttistDecl's for a given element type (see section 3.3).
This doesn't change the validity constraint of section 3.1.  Attributes
in tags have to be unique.

> -----Original Message-----
> From:	Richard Light [SMTP:richard at light.demon.co.uk]
> Sent:	Thursday, June 12, 1997 1:19 AM
> To:	xml-dev at ic.ac.uk
> Subject:	Re: Repeating attribute specifications
> 
> In message <3.0.32.19970611161725.00b540ac at pop.intergate.bc.ca>, Tim
> Bray <tbray at textuality.com> writes
> >>Is there anything in the XML spec which corresponds to the SGML
> >>stricture that "there can only be one attribute specification for
> each
> >>attribute definition", i.e. that you can't have repeated attribute
> >>specifications within a single start-tag?  
> >
> >No.  This is legal in XML.  And in SGML, with the recent TC. -T.
>  
> The other answer I got to this question quoted the XML Lang spec
> (section 3.1):
> 
> "Validity constraint - Unique Att Spec:
> No attribute may appear more than once in the same start-tag."
> 
> This seemed to deal with the issue pretty conclusively: I had just
> failed to look under "start-tags" while thinking about attributes ;-)
> 
> Is this all about to change with the 30 June update?
> 
> Richard Light
> SGML and Museum Information Consultancy
> richard at light.demon.co.uk
> 3 Midfields Walk 
> Burgess Hill
> West Sussex RH15 8JA
> U.K.
> tel. (44) 1444 232067
> 
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