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RE: DTD's

• From: Murali Mani <mani@C...>
• To: "Bullard, Claude L (Len)" <clbullar@i...>
• Date: Thu, 17 May 2001 11:06:36 -0700 (PDT)

This is my 2 cents worth of thought --
we need schemas (like DTDs)for document just like we need schema for
databases -- when the data is large, it becomes difficult for humans to
understand the data without the associated interpretation. Two uses of
interpretation besides the above is that humans query based on the
interpretation, optimizers can very well use this interpretation.

There could be scenarios when the data is small that no interpretation is
needed for humans to understand the data.

regards - murali.

On Thu, 17 May 2001, Bullard, Claude L (Len) wrote:

> That's one use.   Well-formed is what the
> message or document should be in transport.
> With a correct-by-construction application,
> you can build that without a DTD.  Spitting
> well-formed XML from a database is trivial
> because the database schema, GUI, and business
> rules did all the heavy lifting.  On the other
> hand, a DTD or schema has multiple use cases:
>
> o  Rigorous form of contract between
> communicating systems
>
> o  Means to validate a message on send
> or on receipt
>
> o  Means to create or specify an
> authoring environment.  In the first
> case, editors take a DTD and create the
> GUI for editing.  In the second case,
> the DTD is used to get the rules for
> forms or other GUI objects.
>
> This is all well-known stuff.  Your
> developers aren't wrong per se, but
> they aren't being very precise.
>
> It's just another tool in the gig bag.
>
> Len
> http://www.mp3.com/LenBullard
>
> Ekam sat.h, Vipraah bahudhaa vadanti.
> Daamyata. Datta. Dayadhvam.h
>
>
> -----Original Message-----
> From: Sandra Carney [mailto:scarney@e...]
> Sent: Thursday, May 17, 2001 11:43 AM
> To: xml-dev@l...
> Subject: DTD's
>
>
> Hi,
>   We have a question about the necessity of DTD.  There are folks
>   among our developers who postulate that so long as the document
>   is well-formed, we don't need DTD's.  So far, so true.  However,
>   might this pose a quality problem later on especially if you want
>   to limit what are considered legitimate tags in the document?
> Regards,
> Sandra Carney
>
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  • RE: DTD's
    • From: "Bullard, Claude L (Len)" <clbullar@i...>

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