- From: Michael Brunnbauer <brunni@netestate.de>
- Date: Sat, 31 Mar 2012 14:05:57 +0200
- To: Norman Gray <norman@astro.gla.ac.uk>
- Cc: Jonathan A Rees <rees@mumble.net>, Tim Berners-Lee <timbl@w3.org>, public-lod community <public-lod@w3.org>
hi all The document at http://www.w3.org/2001/tag/doc/uddp-20120229/ uses the term X (a sequence of octets + media type) is a representation of Y (an entity). I have a question: Can two different entities have the same representation ? If not, we can define an IR as a thing for which there is at least one sequence of octets + media type that is a representation of it because it's essential characteristics would be conveyed in that message. The term IR would not have much value in this case as it would not be a term of it's own. If yes, I could have a lossy compression algorithm that makes the same sequence of octets out of two different images and still have a representation of those images when I GET them. I think all the difficult questions (or the nitpicking, if you want) do not go away if we drop the term IR. They also lie in the question "does this URI denote what it accesses" or "is this message a representation of the entity" or "do I serve the content of this sucker". Regards, Michael Brunnbauer On Wed, Mar 28, 2012 at 11:35:04PM +0200, Michael Brunnbauer wrote: > > Hallo Norman, > > > -Regardless of how you define IR, everything that denotes what it accesses > > should lie in IR. > > > > -Putting something in NIR therefor also answers the question if it denotes > > what it accesses with "no" by entailment. > > I have worded this very badly. We are talking about things and names of things. > This should be: > > For all URIs U: denote(U) = access(U) -> denote(U) a IR > > It follows: For all URIs U: denote(U) not a IR -> denote(U) != access(U) > > > -There may or may not be IRs that do not denote what they access. > > And this should be: > > There is a URI U where: denote(U) a IR and denote(U) != access(U). > > Now if a am allowed to mint a URI that 303's to your homepage and your > homepage is an IR, such an URI must exist: > > U1 = Your URI for your homepage > U2 = My URI for your homepage > denote(U1) a IR > denote(U2) != access(U2) > denote(U1) = denote(U2) thererfor denote(U2) a IR and denote(U2) != access(U2) > > I think I'll stay out of this discussion from now :-) > > Regards, > > Michael Brunnbauer > > > -- > ++ Michael Brunnbauer > ++ netEstate GmbH > ++ Geisenhausener Straße 11a > ++ 81379 München > ++ Tel +49 89 32 19 77 80 > ++ Fax +49 89 32 19 77 89 > ++ E-Mail brunni@netestate.de > ++ http://www.netestate.de/ > ++ > ++ Sitz: München, HRB Nr.142452 (Handelsregister B München) > ++ USt-IdNr. DE221033342 > ++ Geschäftsführer: Michael Brunnbauer, Franz Brunnbauer > ++ Prokurist: Dipl. Kfm. (Univ.) Markus Hendel -- ++ Michael Brunnbauer ++ netEstate GmbH ++ Geisenhausener Straße 11a ++ 81379 München ++ Tel +49 89 32 19 77 80 ++ Fax +49 89 32 19 77 89 ++ E-Mail brunni@netestate.de ++ http://www.netestate.de/ ++ ++ Sitz: München, HRB Nr.142452 (Handelsregister B München) ++ USt-IdNr. DE221033342 ++ Geschäftsführer: Michael Brunnbauer, Franz Brunnbauer ++ Prokurist: Dipl. Kfm. (Univ.) Markus Hendel
Received on Saturday, 31 March 2012 12:06:22 UTC