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   Re: Success factors for the Web and Semantic Web

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  • From: "Sean B. Palmer" <sean@mysterylights.com>
  • To: Uche Ogbuji <uche.ogbuji@fourthought.com>
  • Date: Thu, 21 Dec 2000 23:32:36 +0000

> I don't know what this means.  What is this "language"?  Is it an
> XML vocabulary/schema?  What is this "correct"?  Is it a matter
> of authority to use a namespace?

Say I created a namespace for a language at http://infomesh.net/testns/
Then, on the Web, there are two different XML documents:-
1. <roota xmlns="http://infomesh.net/testns/"/>
2. <rootb xmlns="http://infomesh.net/tesns/"/>
Here, the root elements, (and possibly the enitre definitions of the
langauges!) are different, but they use the same namespace! Which one is
definitive? Dereference the namespace, and you might well find out (in this
case you won't becasue I didn't write a Schema: but I could have done).

> > 2. A Namespace is still not definitive. Tim's example was of a URI
> >      for Zip codes. There could be hundreds of them: no one is going
> >      to use the same one!
> I'm still not understanding you.

O.K. You define a zip code in a Schema as a 6 digit number. Then I make a
different Schema that says in fact a zip code is an 8 digit number. There
is nothing to say that either one of us is correct.

> > 3. There is no current way to ascribe structure to extended RDF.
> > (Action: create a way!)
> What is this "extended RDF"?  I'm not even sure I can guess what it is.

RDF that will require additional structres not set out in the Model and
Syntax spec, i.e. structures provided by XML Schema.

> >      1. Create XML to RDF extraction tools.
> Happenning all the while.  Examples include Jonathan Borden's work,
> and that of Dan Connolly

I am well aware that there is a lot of work in this area :-) I have been
doing some myself ((X)HTML to RDF).

> >      2. Create notepad databases of RDF
> Can you explain this?

Stuff like Blogspace but in RDF. http://www.blogspace.com/ c.f. FRED

> See the work of Dan Brickley and others.  One of my Fourthought
> colleagues is doing some work in this field as well.

Do you have a URI for that?

> Well, from your 1, 3 and 4, I'd have to conclude that the semantic
> Web is well on the way, but I think your list is not exhaustive.

Of course! Not by any means. In fact I asked people to each come up with
ten uses of the SW they'd like to see. Could you give me your 10?

Kindest Regards,
Sean B. Palmer
http://www.w3.org/WAI/ [ERT/GL/PF]
"Perhaps, but let's not get bogged down in semantics."
   - Homer J. Simpson, BABF07.


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