W3C home > Mailing lists > Public > www-tag@w3.org > May 2007

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

From: Dan Brickley <danbri@danbri.org>
Date: Thu, 31 May 2007 15:10:18 +0100
Message-ID: <465ED74A.1000006@danbri.org>
To: Pat Hayes <phayes@ihmc.us>
CC: John Cowan <cowan@ccil.org>, www-tag@w3.org
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.



<http://xmlns.com/foaf/0.1/Person> .

<http://xmlns.com/foaf/0.1/name> "Pat Hayes" .

<http://xmlns.com/foaf/0.1/name> "Patrick John Hayes" .

<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://xmlns.com/foaf/0.1/Document> .

<http://www.ihmc.us/users/phayes/PatHayes> .

<http://xmlns.com/foaf/0.1/homepage> <http://www.ihmc.us/users/phayes/> .

<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://purl.org/vocab/bio/0.1/event> _:genid1 .

<http://xmlns.com/foaf/0.1/Image> .

<http://www.ihmc.us/_images/people/large/phayes.jpg> .

<http://xmlns.com/foaf/0.1/gender> "male" .

<http://xmlns.com/foaf/0.1/Document> .

<http://www.ihmc.us/users/phayes/PatHayes> .

<http://www.ihmc.us/users/phayes/PatHayes> .

<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
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

<TITLE>406 Not Acceptable</TITLE>
<H1>Not Acceptable</H1>
An appropriate representation of the requested resource 
/users/phayes/PatHayes could not be found on this server.<P>
Available variants:
<li><a href="PatHayes.html">PatHayes.html</a> , type text/html
<ADDRESS>Apache/1.3.33 Server at www.ihmc.us Port 16080</ADDRESS>

Received on Thursday, 31 May 2007 14:10:50 UTC

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