Re: [xml-dev] XML vocabulary for expressing constraints?

[Liam R E Quin <liam@w3.org>]

On Fri, 2013-12-13 at 15:27 +1100, Stephen Cameron wrote:
> Hi Liam,
> 
> Please explain this too me. I've been thinking that an address can have
> either semantic meaning, as in an RDF triple, or identify a resource, a
> representation of which might ideally contain links to semantic information
> (such as using RDFa) charaterising the content. An inside looking out vs an
> outside looking in (via topic maps) contrast I guess is your point?

It's not so much that a URI has some sort of intrinsic meaning - it's
just a symbol. It's how it's used.

The RDF 1.0 spec was very loose in its examples (vCards I think) in
conflating a URI of someone's home page on the Web with the person
themselves, or a picture of the person, or something about them on the
Web or sometihng written by them.

I can't easily say, using RDF,
http://www.fromoldbooks.org/Aubrey-HistoryOfEngland-Vol2/pages/438-detail-Portrait-of-King-Henry-VIII/#fg=%237929ce_bg=none
is an image of a wood-engraving depicting King Henry VIII. of England
which has been coloured purple.

To do that I need URIs for King Henry and for England and for purple, as
opposed to URIs for Web pages about those things.

The HTTP Range discussion I mentioned was an attempt to say that a # on
the end of a URI meant you were using the URI as a surrogate for a
person (or was it the absence of a #? I forget).

Hope this helps.

Liam

-- 
Liam Quin - XML Activity Lead, W3C, http://www.w3.org/People/Quin/
Pictures from old books: http://fromoldbooks.org/
Ankh: irc.sorcery.net irc.gnome.org freenode/#xml