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Notations for datatypes

• To: Jeni Tennison <jeni@j...>,John Cowan <jcowan@r...>
• Subject: Notations for datatypes
• From: Jonathan Robie <jonathan.robie@d...>
• Date: Mon, 30 Sep 2002 08:04:29 -0400
• Cc: xml-dev@l...
• In-reply-to: <48225068110.20020929063712@j...>
• References: <200209290419.AAA09297@m...><200209290419.AAA09297@m...>

At 06:37 AM 9/29/2002 +0100, Jeni Tennison wrote:

>So, aside from it being an obvious travesty to shoe-horn them into
>DTDs, could you use the W3C XML Schema data types in a DTD by
>declaring a NOTATION? The equivalent of:
>
>   datatypes xs = "http://www.w3.org/2001/XMLSchema-datatypes"
>
>   element date { xs:date }
>
>being something along the lines of:
>
>   <!NOTATION xs.date
>              PUBLIC 'http://www.w3.org/2001/XMLSchema-datatypes#date'>
>
>   <!ELEMENT date (#PCDATA)>
>   <!ATTLIST date
>     type NOTATION (xs.date) #FIXED 'xs.date'>

Rick Jelliffe reminded me in private email that he had proposed notations 
to the W3C XML Schema WG as a way of declaring data types. Let me ask a few 
questions about a notation-based design for declaring datatypes:

1. How do you declare the types of attributes?
2. How do you define common libraries of data types using notations that 
are shared across schemas?
3. How would using a syntax based on notations simplify the design of the 
schema language as a whole - what difference would it make?

Jonathan

• Follow-Ups:
  • Re: Notations for datatypes
    • From: Uche Ogbuji <uche.ogbuji@f...>
  • Re: Notations for datatypes
    • From: Jeni Tennison <jeni@j...>
  • Re: Notations for datatypes
    • From: John Cowan <jcowan@r...>

• References:
  • Re: Datatypes - it's in the contract
    • From: John Cowan <jcowan@r...>
  • Re: Datatypes - it's in the contract
    • From: Jeni Tennison <jeni@j...>

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