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Home -> Community -> Usenet -> comp.databases.theory -> Re: Relational URI (was: Re: Relational Calculus URIs?)

Re: Relational URI (was: Re: Relational Calculus URIs?)

From: Dawn M. Wolthuis <dwolt_at_tincat-group.com>
Date: Wed, 21 Apr 2004 12:05:28 -0500
Message-ID: <c669l8$b6h$1@news.netins.net>


"Laconic2" <laconic2_at_comcast.net> wrote in message news:h8OdnS24L81hoBvdRVn-sQ_at_comcast.com...
> So, if there were such a thing as URI, what would it be?
> How about "Uniform Resource Identifier"?
>
> The trouble with URL is that it's an address. Basically, a pointer. And
> when a resource moves from one "location" to another, all the pointers to
> the old location get left behind, and invalidated.
>
> Worse, when a resource gets replaced by a different resource, with a
> different identity, but the same location, the pointer acts like it's
still
> valid, although it actually should not be.

golly this sounds familiar

> If we had URI's we could be begin to build the "world wide objects"
instead
> of the "world wide web".

You are familiar with URI's, right?

>
> I'd better shut up before Dawn catches me writing this!

Thanks for recognizing my existence on this list (it wasn't easy to have a voice here as some might recall) and, I agree -- I suspect that URL thing will never catch on. If it does, it simply won't work over time. No users will put up with missing links. It is bound to tank, uh, soon. Having a single "key" to a document is just a bad idea, especially if there is any intelligence in that key (such as domain name). It turns the model into one of Functions rather than the most more friendly extension to functions -- relations.

Let's watch and see whether the WWW "functions" and di-graph model or the RDBMS model fades sooner.
smiles. --dawn

P.S. I just filled in for two courses for two weeks for a Calculus professor on a paternity leave, not having taught calculus for 20 years. I saw how much of the introductory courses are devoted to functions rather than the superclass of relations (an exception being conic sections). If we want simplicity in data modeling, using functions seems like a good plan, so I think I'll promote it ;-) Received on Wed Apr 21 2004 - 12:05:28 CDT

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