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Re: New draft TAG Finding on The Self-Describing Web

From: Jonathan Rees <jonathan.rees@gmail.com>
Date: Thu, 31 May 2007 10:38:19 -0400
Message-ID: <3cff5e070705310738u67d6712fia9c8b7ccea53056@mail.gmail.com>
To: "Dan Brickley" <danbri@danbri.org>
Cc: "Pat Hayes" <phayes@ihmc.us>, "John Cowan" <cowan@ccil.org>, www-tag@w3.org

A URI identifies a resource; a resource either is an information
resource or it isn't; content negotation can't hedge that question.
http://www.ihmc.us/users/phayes/PatHayes.html isn't a foaf:Document
becuase foaf:Document and foaf:Person are disjoint, and your RDF says
it's a foaf:Person... but the 200 response, according to httpRange-14,
means that the identified resource is an information resource (~=
foaf:Document)... a contradiciton. What gives?

On 5/31/07, Dan Brickley <danbri@danbri.org> wrote:
> Pat Hayes wrote:
> >
> >> Xiaoshu Wang scripsit:
> >>
> >>>  Is a picture of Shakespeare a "representation" or a "description" of
> >>>  him? IMHO, the essential difference between an information resource and
> >>>  a non-information resource is only the former can have a
> >>>  "representation" in the web.
> >>
> >> In the semantic web, what we talk about is resources, and resources
> >> have URIs, so if we are allowed to talk about Shakespeare, there must
> >> be a URI for him.
> >
> > Actually there must be a URIreference for him. This matters, as the
> > URIref is likely to be in an RDF/XML document which itself has a URI;
> > but that document, unlike Shakespeare, is an information resource.
> >
> >>  If http://www.heritage.org/images/shakespeare.jpg
> >> were declared by its owner to refer to Shakespeare, then the content
> >> retrieved from that URI would unquestionably be a representation of him.
> >
> > Not unquestionably. I tried to create something that as authoritatively
> > and unambiguously as possible refers to me:
> >
> > http://www.ihmc.us/users/phayes/PatHayes.html
> >
> > but have been told that since I do not perform the HTTP re-direct ritual
> > required by the TAG, it in fact does not.
>
> Re "Machine-readable information which may help fix the denotation of
> the URI http://www.ihmc.us/users/phayes/PatHayes will be added to this
> page in due course." ... I had a quick go at this.  There's a lot that I
> didn't capture due to lack of vocab, a lot that couldn't sensibly be
> captured in plain RDF anyway, but the remains rendered as 19 RDF
> statements are copied below, and attached in RDF/XML.
>
> I modeled /PatHayes.html as a plain Document that is about you, while
> the content-negotiable one, /PatHayes ... just *is* you.
>
> I'd argue that it continues to be you, even if your webserver is
> misconfigured. Similarly, it would still be you, even if that same
> webserver allowed some other person with a login on www.ihmc.us to edit
> your documents and insert lies and misinformation. PGP-signing
> PatHayes.html would offer some protection there; see
> http://usefulinc.com/foaf/signingFoafFiles for an experimental howto.
>
> cheers,
>
> Dan
>
> <http://www.ihmc.us/users/phayes/PatHayes>
> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
> <http://xmlns.com/foaf/0.1/Person> .
>
> <http://www.ihmc.us/users/phayes/PatHayes>
> <http://xmlns.com/foaf/0.1/name> "Pat Hayes" .
>
> <http://www.ihmc.us/users/phayes/PatHayes>
> <http://xmlns.com/foaf/0.1/name> "Patrick John Hayes" .
>
> <http://www.ihmc.us/users/phayes/PatHayes>
> <http://purl.org/vocab/bio/0.1/olb> "US resident alien and UK citizen,
> born in the town of Newent, Gloucestershire, UK, on 21 August 1944, the
> only son of Alexander and Betty Hayes and brother of Mary Ellen Hayes,
> of Canton, Cardiff" .
>
> <http://www.ihmc.us/users/phayes/>
> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
> <http://xmlns.com/foaf/0.1/Document> .
>
> <http://www.ihmc.us/users/phayes/>
> <http://www.w3.org/2002/07/owl#differentFrom>
> <http://www.ihmc.us/users/phayes/PatHayes> .
>
> <http://www.ihmc.us/users/phayes/PatHayes>
> <http://xmlns.com/foaf/0.1/homepage> <http://www.ihmc.us/users/phayes/> .
>
> <http://www.ihmc.us/users/phayes/PatHayes>
> <http://xmlns.com/foaf/0.1/mbox> <mailto:phayes@ihmc.us> .
>
> _:genid1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
> <http://purl.org/vocab/bio/0.1/Birth> .
> _:genid1 <http://purl.org/vocab/bio/0.1/date> "1944-08-21" .
>
> _:genid1 <http://purl.org/vocab/bio/0.1/place> "Newent, Gloucestershire,
> UK" .
>
> <http://www.ihmc.us/users/phayes/PatHayes>
> <http://purl.org/vocab/bio/0.1/event> _:genid1 .
>
> <http://www.ihmc.us/_images/people/large/phayes.jpg>
> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
> <http://xmlns.com/foaf/0.1/Image> .
>
> <http://www.ihmc.us/users/phayes/PatHayes>
> <http://xmlns.com/foaf/0.1/depiction>
> <http://www.ihmc.us/_images/people/large/phayes.jpg> .
>
> <http://www.ihmc.us/users/phayes/PatHayes>
> <http://xmlns.com/foaf/0.1/gender> "male" .
>
> <http://www.ihmc.us/users/phayes/PatHayes.html>
> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
> <http://xmlns.com/foaf/0.1/Document> .
>
> <http://www.ihmc.us/users/phayes/PatHayes.html>
> <http://xmlns.com/foaf/0.1/primaryTopic>
> <http://www.ihmc.us/users/phayes/PatHayes> .
>
> <http://www.ihmc.us/users/phayes/PatHayes.html>
> <http://xmlns.com/foaf/0.1/maker>
> <http://www.ihmc.us/users/phayes/PatHayes> .
>
> <http://www.ihmc.us/users/phayes/PatHayes.html>
> <http://purl.org/dc/terms/abstract> "This document hereby declares,
> establishes and records the fact that the URI
> http://www.ihmc.us/users/phayes/PatHayes is owned by Pat Hayes and is
> intended by Pat Hayes to rigidly denote himself, Patrick John Hayes,
> commonly known as Pat Hayes, US resident alien and UK citizen, born in
> the town of Newent, Gloucestershire, UK, on 21 August 1944, the only son
> of Alexander and Betty Hayes and brother of Mary Ellen Hayes, of Canton,
> Cardiff: the legal person and living breathing human being whose US
> social security number is the decimal rendering of the hexadecimal
> 21D930EA and whose facial features can be inspected in Brobdingnagian
> detail by clicking here." .
>
>
>
>
>
>
> aside: here's a chat I just had with your webserver in HTTP-eze...
>
> flipflip:~/Desktop danbri$ telnet www.ihmc.us 80
> Trying 72.236.182.133...
> Connected to www.ihmc.us.
> Escape character is '^]'.
> GET /users/phayes/PatHayes HTTP/1.1
> Accept: application/flesh-and-blood-person
> Host: danbri.org
>
> HTTP/1.1 406 Not Acceptable
> Date: Thu, 31 May 2007 14:11:45 GMT
> Server: Apache/1.3.33 (Darwin) PHP/4.3.4 mod_perl/1.26 DAV/1.0.3
> Alternates: {"PatHayes.html" 1 {type text/html} {length 2347}}
> Vary: negotiate
> TCN: list
> Connection: close
> Transfer-Encoding: chunked
> Content-Type: text/html; charset=iso-8859-1
>
> 1b1
> <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
> <HTML><HEAD>
> <TITLE>406 Not Acceptable</TITLE>
> </HEAD><BODY>
> <H1>Not Acceptable</H1>
> An appropriate representation of the requested resource
> /users/phayes/PatHayes could not be found on this server.<P>
> Available variants:
> <ul>
> <li><a href="PatHayes.html">PatHayes.html</a> , type text/html
> </ul>
> <HR>
> <ADDRESS>Apache/1.3.33 Server at www.ihmc.us Port 16080</ADDRESS>
> </BODY></HTML>
>
>
>
>
>
>
Received on Thursday, 31 May 2007 14:38:52 GMT

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