Daniel Lewis

A Quick Example of Content Negotiation.
Requires the curl command line tool, but can be done using any http fetch tool.
Here is the command for getting RDF/XML:
$ curl -I -H “Accept: application/rdf+xml” http://myopenlink.net/dataspace/person/danieljohnlewis#this
Here is the output:
HTTP/1.1 200 OK
Server: Virtuoso/05.00.3028 (Linux) i686-generic-linux-glibc23-32 VDB
Connection: Keep-Alive
Date: Wed, 07 May 2008 15:23:16 GMT
Accept-Ranges: bytes
Content-Length: 0
ETag: “6689-2008-05-07T11:23:16.000000-0-9851f9cbda1201e253939e204e596f4d”
Content-Type: application/rdf+xml
Here is the […]

The April 2008 Semantic Web Gang Podcast has been released. I enjoyed taking part in this episode, it is a little bit more relaxed than our first episode (mainly because there are less people, and so everybody got their chance to speak about particular topics).
Strangely, I sound incredibly camp on this recording… oh dear!!
Topics include:

Wikipedia […]

Hi all,
This is just clearing up the misconceptions that Ben Werdmuller has written in his Guest Post on ZDnet titled “Guest post: Introducing the Open Data Definition”.
“The semantic web community has RDF, a format designed for the purpose that is potentially powerful but – as one might expect from the semantic web community – prone […]

So I have talked about how RDF is really simple, and why Linked Data are the roots of the web… but we need a way of serving this data in a meaningful way, this is where the Data Server steps in!
The allegory continues……

Here we see our home-grower digging up some potatoes.
The potatoes are Linked […]

OK, so in my last post (”RDF: Simpler if you look at it in a different way“) I said that RDF is a modeling framework to link data together in the form of object to object relationships, I briefly mentioned some “vocabularies” (aka ontologies) and some formats (e.g. Notation3, RDF/XML). I want to mention again […]

I have figured out why some people are reluctant to use RDF, and its because they are seeing it as a format and not a model. RDF is a modeling framework, it is not a format!
RDF is supposed to be understood in a visual way:

Which is essentially understood as a triple of URIs:
<http://myopenlink.net/dataspace/person/danieljohnlewis#this> <http://xmlns.com/foaf/0.1/made><http://uk.youtube.com/watch?v=oWfaoP1Ti2Q>
And […]

I’ve just heard about the Open Data Definition (ODD), its a good idea, but it has already been done in the form of Semantically Interconnected Online Communities (SIOC)….
SIOC (pronounced “Shock” <– its Irish) “can [also] be used as a syndication format, like RSS”. Plus SIOC has already been deployed in many web systems, and it […]

Good luck to all going to www2008, especially those taking part in the Linked Data on the Web (LDOW2008) Workshop and the Web Science Workshop (WSW2008).
Unfortunately I am not going to be there, but I would have loved to have gone (maybe next time). Some of my work (specifically the Data Spaces diagram) is included […]

Everybody knows that there is a division between business and academia (unless you are interested in the academic side of business, or run the administration for a university). So whats the reason?
I briefly mention this in the forthcoming Semantic Web Gang podcast, and I think there are a few reasons.
Cause of Separation: Risk
Businesses are established, […]

On the 22nd May 2008 in Oxford there will be a talk by the BCS entitled “Education in the Internet Age“, unfortunately I would have moved to Bristol by then and should be in the middle of settling in and getting used to the new environment. However, it doesn’t stop me thinking about writing a […]