[foaf-dev] foaf for dummies

Mischa@Garlik mischa.tuffield at garlik.com
Fri Feb 6 03:33:58 CET 2009


You could try foaf.qdos.com

and specifically :

The viewer :

and you could even try the builder, which gives a visual  
representation and give you the ability to edit your foaf file.


Here is some blurb about it:


This is my foaf file (http://mmt.me.uk/foaf.rdf) rendered in the viewer:


Note that in order for your foaf file to be rendered in the viewer you  
need to upload your foaf file at the ping url : http://foaf.qdos.com/ping 
  . Btw the link to your foaf file is broken at the moment ;)

I also generate the HTML of my website http://mmt.me.uk/ from my foaf  
file, I keep meaning to put the code somewhere...


On 6 Feb 2009, at 02:24, Juan Sequeda wrote:

> Talking about FOAF for dummies, is their a visual representation of  
> FOAF where one can see all the classes and properties?
> Juan Sequeda, Ph.D Student
> Dept. of Computer Sciences
> The University of Texas at Austin
> www.juansequeda.com
> www.semanticwebaustin.org
> On Thu, Feb 5, 2009 at 11:25 AM, Dan Brickley <danbri at danbri.org>  
> wrote:
> On 5/2/09 18:13, Alexander Garcia Castro wrote:
> > I am new to FOAF, I have loaded FOAF in Protege and I can see FOAF  
> has
> > several prefixes, P1, P2, P3, P4. Instead of having all these  
> prefixes
> > why not to have a foaf prefix that groups p1...p4?
> This sounds useful feedback to pass along to the Protege folk.
> If you look at the raw source of http://xmlns.com/foaf/spec/index.rdf
> you can see the namespaces we use.
> <rdf:RDF
>        xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
>        xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
>        xmlns:owl="http://www.w3.org/2002/07/owl#"
>        xmlns:vs="http://www.w3.org/2003/06/sw-vocab-status/ns#"
>        xmlns:foaf="http://xmlns.com/foaf/0.1/"
>        xmlns:wot="http://xmlns.com/wot/0.1/"
>        xmlns:dc="http://purl.org/dc/elements/1.1/">
> There is also the use of my old Wordnet namespace experiment, which  
> was
> based on the idea that vocabularies could partially ground their terms
> in large scruffy linguistically derrived pseudo-ontologies. At the
> moment the links probably 404, but I think it is worth upgrading to  
> use
> wordnet 2.x since it is much more cleanly structured.
> > also, p4:Agent-3 has a sub class which is p1:Agent, which is the
> > difference between these two classes?
> p4:Agent-3 means the 3rd sense of Agent from Wordnet (wordnet version
> 1.6). This made more sense back when that URI worked properly.
> > The same question regarding
> > p1:Person, it is defined as a subclass of p2:SpatialThing, why?  
> how is a
> > person a spatial thing?
> Because all things that are FOAF persons, are also the kinds of things
> that the wgs84:SpatialThing vocab - see http://www.w3.org/2003/01/ 
> geo/ -
> was created to describe. Things that can be positioned in space  
> (more or
> less; dead people, imaginary people aren't usefully described this  
> way)
> with lat/long/alt.
>  > shouldnt it be defined as a class on its own?
> The basic idea here that Protege is not reflecting, is the idea that  
> we
> are collectively creating a Web of inter-related vocabularies, ie.  
> that
> there are overlaps. You will probably have a similar experience if you
> try loading SIOC into Protege too.
> > spatial things should refeer to things that define a space such as a
> > room, a living room, a garage, street, etc. if a spatial thing is
> > anything that fits in a given space then everything is a spatial  
> thing.
> Don't read too much into the class name. Yes, the idea is very general
> and quite simplistic. But it's a start. I hope we get richer geo
> ontologies more widely deployed soon.
> > p4:Organization has a subclass, p1:Organization , what is the  
> purpouse
> > in having these loops? like organization is a organization just that
> > both belong to different prefixes.
> >
> > Document, same situation.
> This idiom was used in FOAF before the OWL vocabulary came along. So  
> we
> could probably use equivalentClass or something today. The idea is  
> that
> we are connecting similar or identical classes from different RDF
> vocabularies...
> Hope this helps, and thanks for your interest
> cheers,
> Dan
> --
> http://danbri.org
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Mischa Tuffield
Email: mischa.tuffield at garlik.com
Homepage - http://mmt.me.uk/
FOAF - http://mmt.me.uk/foaf.rdf

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