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Re: RDDL -- How would you design it?

• To: "Clark C . Evans" <cce@c...>,The Deviants <xml-dev@l...>
• Subject: Re: RDDL -- How would you design it?
• From: Elliotte Rusty Harold <elharo@m...>
• Date: Tue, 22 Jan 2002 10:22:11 -0500
• In-reply-to: <20020121142932.A31562@d...>
• References: <575CBD83AE7DD411A23500B0D049C2F941A44D@SRVSOCRATE><20020121142932.A31562@d...>

At 2:29 PM -0500 1/21/02, Clark C . Evans wrote:


>Document:
>   This is a serialized entity.
>
>Class:
>   This is a collection of documents which are
>   somehow related.  A concrete implementation
>   of a class could be a namespace URI; but
>   not all namespace URIs are classes.
>

This does not coincide with any of the customary meanings of the word 
"class" I'm familiar with. I suggest using a different word for this 
thing.

>Resource:
>   This is a Document which contains information
>   related to a Class.   Since the Resource is
>   a document, it may belong to a Class.
>

That's too specific for the word "resource". The word resource is 
already effectively defined by the URI spec. You need a different 
term here too. This sounds like what RDDL calls a "related resource".

>   Examples of Resouce Classes include, but are
>   not limited to... (a) schema to validate Documents
>   beloning to the Class, (b) transforms from documents
>   in the related Class to another Class, (c) human-readable
>   texts, such as an HTML document.
>
>Authority:
>   This is an undefined object which is vouches for
>   the autenticity of a Resource.
>

Again, you're overloading existing terminology. Authority is already 
defined by the URI spec. I'm not sure if this definition perfectly 
coincides with that or not.

>Bundle:
>   This is a tuple of (a) Authrority, and (b) a list
>   of zero or more Resources.
>

Id this a physical object? or merely abstract information?

>Directory:
>   This is a collection of Bundles.
>

Ditto.


>
>Questions for the model...
>
>  a. Can a Document belong to more than one Class?
>

I think answering this question requires a clearer definition of 
"class". In fact, I think all the questions require a better 
understanding of the thing you're calling a class.
-- 

+-----------------------+------------------------+-------------------+
| Elliotte Rusty Harold | elharo@m... | Writer/Programmer |
+-----------------------+------------------------+-------------------+
|          The XML Bible, 2nd Edition (Hungry Minds, 2001)           |
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• References:
  • Re: RDDL -- How would you design it?
    • From: "Clark C . Evans" <cce@c...>

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