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Re: RDDL and document types was : Re: The task to be

• To: Jonathan Borden <jborden@m...>
• Subject: Re: RDDL and document types was : Re: The task to be solved by RDDL.
• From: Michael Brennan <mpbrennan@e...>
• Date: Tue, 22 Jan 2002 15:40:54 -0800
• Cc: xml-dev@l...
• References: <2C61CCE8A870D211A523080009B94E4306DF628A@HQ5> <04b201c19fa6$aa82a240$2cd0a340@paultx> <005a01c19fb4$08f4b8b0$0100000a@nico> <00bb01c19fb8$1bdbe800$0a2e249b@n...> <059401c19fd0$7912e560$2cd0a340@paultx> <007d01c19fdf$f9397420$0301a8c0@n...> <5.1.0.14.2.20020118160029.022ee0d0@p...> <080b01c1a084$13bfd1f0$2cd0a340@paultx> <p04330101b86f98271497@[192.168.254.4]> <3C4D1D12.30D05BF2@r...> <031801c1a35f$6db0f9e0$0a2e249b@n...>

Jonathan Borden wrote:

<snip/>

> The 'problem' is that a given document does not define a single document
> type, nor does a namespace define a document type, so that a mechanism is
> required to indicate which 'type set' a document is intended to belong to.
> 
> e.g. <!DOCTYPE or xsi:schemaLocation="..."
> 
> How might RDDL help?
> 
> Perhaps we could define a _purpose_ to indicate document type:
> 
> http://www.rddl.org/purposes#document-type
> 
> and then the _set_ of all document types an instance is intended to belong
> to would be referenced by the set of all rddl:resources that have this
> purpose, but whose nature indicates the particular schema definition
> language used to define the type.
> 
> We still need a means to connect the instance to the document type set
> definition. It would be really nice to use the <!DOCTYPE declaration for
> this, but this has already been hardwired to DTDs... and so the Public
> Identifier cannot be connected to a RDDL document by this mechanism.
> 
> Perhaps an attribute:
> 
> <root rddl:doctype="....a RDDL directory of 'document types' ...">

I don't particularly like this. For one, the rddl:doctype attribute is
essentially a processing directive. I think a PI would be more
appropriate. (XML Schema set a bad precedent in this regard, IMHO.) I'm
also not convinced that a specialized attribute or PI and specialized
purpose are needed.

I still like the XLink-in-a-PI idea I tossed out awhile ago, but oh
well. Instead of yet another PI/attribute for one narrow purpose of
associating one narrow type of resource with a document, why not a PI
that can associate a linkbase with a document? That linkbase could have
an extended link associating outbound links with a DTD public ID or
system ID. Then you can associate resources with a DOCTYPE in a way that
affords greater flexibility than RDDL. The linkbase could also associate
links with namespaces (as RDDL does) or other resources, even non-XML
resources.

• Follow-Ups:
  • Re: RDDL and document types was : Re: Thetask to be solved by RDDL.
    • From: Elliotte Rusty Harold <elharo@m...>
  • Re: RDDL and document types was : Re: The task to be solved by RDDL.
    • From: "Jonathan Borden" <jborden@m...>

• References:
  • RE: RDDL (was RE: Negotiate Out The Noise)
    • From: "Bullard, Claude L (Len)" <clbullar@i...>
  • Re: RDDL (was RE: Negotiate Out The Noise)
    • From: Paul T <pault12@p...>
  • Re: RDDL (was RE: Negotiate Out The Noise)
    • From: "Nicolas Lehuen" <nicolas.lehuen@u...>
  • Re: RDDL (was RE: Negotiate Out The Noise)
    • From: "Jonathan Borden" <jborden@m...>
  • Re: RDDL (was RE: Negotiate Out The Noise)
    • From: Paul T <pault12@p...>
  • Re: RDDL (was RE: Negotiate Out The Noise)
    • From: "Jonathan Borden" <jborden@m...>
  • Re: RDDL (was RE: Negotiate Out The Noise)
    • From: Tim Bray <tbray@t...>
  • The task to be solved by RDDL. Re: RDDL (was RE: Negotiate Out The Noise)
    • From: Paul T <pault12@p...>
  • Re: The task to be solved by RDDL. Re: RDDL(was RE: Negotiate Out The Noise)
    • From: Elliotte Rusty Harold <elharo@m...>
  • Re: The task to be solved by RDDL. Re: RDDL(was RE: Negotiate Out The Noise)
    • From: Ronald Bourret <rpbourret@r...>
  • RDDL and document types was : Re: The task to be solved by RDDL.
    • From: "Jonathan Borden" <jborden@m...>

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