[foaf-dev] foaf validator

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[foaf-dev] FOAF in RDFa, Using dcterms with foaf:Publication

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Re: [foaf-dev] foaf validator

Hi Mischa,

On 11-08-03 at 01:46am, Mischa Tuffield wrote:
> Thought I would mail this list, as you foafs are the most likely to 
> care.
> 
> I have got the foaf validator thing we worked on up and online again :
> 
> http://foaf.qdos.com/validator/

[snip]

> comments and feedback re: validator most welcomed

I tried validating my own FOAF file:

http://foaf.qdos.com/validator/uri?URI=http://dr.jones.dk/me/index.rdf

I am puzzled about the results - seems to me that the warnings for tests 
1-3 is bogus as those allegedly missing declarations indeed exist in my 
file.  Or am I composing my FOAF data wrongly?

My FOAF file was generated from http://dr.jones.dk/me/index.ttl using 
mkfoaf.sh available below http://dr.jones.dk/foaf/ .

Any other other comments and criticism on my (fairly large) 
hand-maintained FOAF file is much appreciated.

 - Jonas

--

-- 
 * Jonas Smedegaard - idealist & Internet-arkitekt
 * Tlf.: +45 40843136  Website: http://dr.jones.dk/

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Re: [foaf-dev] foaf validator

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Re: [foaf-dev] foaf validator

On 11-08-06 at 12:18am, Mischa Tuffield wrote:
> Hi Jonas, 
> 
> On 5 Aug 2011, at 19:08, Jonas Smedegaard wrote:
> > I tried validating my own FOAF file:
> > 
> > http://foaf.qdos.com/validator/uri?URI=http://dr.jones.dk/me/index.rdf
> > 
> > I am puzzled about the results - seems to me that the warnings for 
> > tests 1-3 is bogus as those allegedly missing declarations indeed 
> > exist in my file.  Or am I composing my FOAF data wrongly?

> when you parse http://dr.jones.dk/me/index.rdf none of the triples in 
> the document talk about the URI which the document was fetched from. 
> So yeah your foaf document has an rdf:type 
> foaf:PersonalProfileDocument triple, but the subject of that tripe is 
> <http://dr.jones.dk/me/> due to the use of :
> 
> xml:base="http://dr.jones.dk/me/" in your rdf:xml

Ah.  Thanks!

I have fought for a long time to both support content-negotiation and 
serve RDF as nice directory URLs rather than exposing the ugly 
extension.  I use Apache2 but haven't figured out how to make it rank 
RDF higher than GPG sigs.

> FWIW, I believe the validator was only giving off "Warnings" not 
> errors.

Yes.  I strive for perfection, and thus want also warnings fixed. 

> > My FOAF file was generated from http://dr.jones.dk/me/index.ttl 
> > using mkfoaf.sh available below http://dr.jones.dk/foaf/ .
> 
> yay to ttl :) I will have a look at mkfoaf.sh at some point ...

There is not much to the script, actually.  The other scripts in same 
dir might be more interesting 

Took me some time to find a method that works both ways: I can generate 
RDF and from the RDF generate the exact same Turtle file.  Added that 
reverse script now as well: rdf2turtle.sh

Oh, btw: I thought I'd done the WoT setup properly using GPG signing.  
What am I missing there to be "compliant" with your validator?

> Am liking your arabic foaf:nick, 
> يونس
> In Farsi we have a sound closer to the english "Je" than the arabic 
> "You" sounding letter at the start of the foaf:nick, you could also 
> add a:
> 
> <foaf:nick>جنس</foaf:nick>

Great. Added now!

> Otherwise it all looks good, /me waves and says thanks in public for 
> all the debian stuff you have been doing, THANK YOU!

Thanks for the kind words.

> Mischa *goes back to watching "Walking Dead" ...

Hmm - didn't know that one.  Seems interesting!

 - Jonas

--

-- 
 * Jonas Smedegaard - idealist & Internet-arkitekt
 * Tlf.: +45 40843136  Website: http://dr.jones.dk/

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Re: [foaf-dev] foaf validator

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Re: [foaf-dev] FOAF in RDFa, Using dcterms with foaf:Publication

Quoting Bruce Whealton <bruce@...>:

> I was curious as to whether one needs to use a vocabulary like bibo:  
> bibliography for referencing publications, like books, magazines,  
> etc.  I was given that recommendation at some point.  Are there not  
> enough terms in dcterms to pretty much cover this?  It certainly is  
> less complex.  Does anyone have experience using this?

DC lacks specific terms for journal title (as opposed to article or  
primary resource title), volume and number, as well as page ranges.  
BIBO uses DC for title, agent, contributor, etc., but defines the  
journal article specific terms in its own name space.

kc

>
> Regarding RDFa, for specifying foaf data.  I haven?t been able to  
> find an answer doing a search online as to whether various  
> attributes can be used on almost any tag or is it only a few tags.   
> For example, this is how I used foaf:depiction
> <img rel="foaf:depiction"  
> resource="http://brucewhealton.us/photos/BruceCloseup.jpg"  
> src="http://brucewhealton.us/photos/BruceCloseup.jpg"/>
> I don?t know if the resource attribute is redundant or not.
>
> Thanks,
> Bruce
>
>

--

-- 
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m: 1-510-435-8234
skype: kcoylenet

Re: [foaf-dev] FOAF in RDFa, Using dcterms with foaf:Publication

On 4 Aug 2011, at 06:53, Bruce Whealton wrote:

> I was curious as to whether one needs to use a vocabulary like bibo: bibliography for referencing
publications, like books, magazines, etc.  I was given that recommendation at some point.  Are there not
enough terms in dcterms to pretty much cover this?  It certainly is less complex.  Does anyone have
experience using this?

As Karen says, bibo is an extension of dc, not an alternative to it. The bibo documentation uses dc in many
places, [1] and it's possible to follow the bibo docs and not use anything from the bibo namespace. [2]

> Regarding RDFa, for specifying foaf data.  I haven’t been able to find an answer doing a search online as
to whether various attributes can be used on almost any tag or is it only a few tags.  For example, this is how I
used foaf:depiction
> <img rel="foaf:depiction" resource="http://brucewhealton.us/photos/BruceCloseup.jpg"  src="http://brucewhealton.us/photos/BruceCloseup.jpg"/>
> I don’t know if the resource attribute is redundant or not.

Well it's redundant in the sense that you have repeated the url, but to remove the repetition you need to
rearrange a little:

<span rel="foaf:depiction">
    <img src="http://brucewhealton.us/photos/BruceCloseup.jpg"/>
</span>

(you may have a suitable enclosing tag already)

And yes, you can use RDFa attributes everywhere. If you care about validation you'll need the rdfa+xhtml dtd.

Damian

[1] <http://bibotools.googlecode.com/svn/bibo-ontology/trunk/doc/index.html>
[2] Bibo is partly a way to use dc, foaf etc, together with some more specialised terms introduced where
other vocabs have gaps. The former aspect is sometimes called an 'application profile' in the dc community.

[foaf-dev] looking for contract remote job

if you know anyone hiring, let me know.

---

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Re: [foaf-dev] foaf validator

On 11-08-06 at 11:08am, Mischa Tuffield wrote:
> On 6 Aug 2011, at 01:13, Jonas Smedegaard wrote:
> > I have fought for a long time to both support content-negotiation 
> > and serve RDF as nice directory URLs rather than exposing the ugly 
> > extension.  I use Apache2 but haven't figured out how to make it 
> > rank RDF higher than GPG sigs.
> 
> So, yeah the problem the validator is choking is because of its turtle 
> parser isn't great. This is a bug in the RAP PHP library, which isn't 
> maintained anymore, I have forked it in github, and will look into why 
> n3 parser is crapping out in the future, but not today...

Uhm, possibly that issue plays a role too, but what I meant above was 
*not* that Turtle was served instead of RDF/XML, but that my current 
Apache2 content negotiation setup favors "*.rdf.pgp" over "*.rdf".

> But to your point above, your apache setup isn't quite right: 
> 
> When i : 
> 
> `curl  -H 'Accept: application/rdf+xml, application/rdf+turtle, application/x-turtle,
text/turtle, application/xml, */*' 'http://dr.jones.dk/me/'` 
> 
> I get back turtle ... 

I believe your test is flawed: when *both* leaving out "q" ratings and 
including a wildcard, it is essentially equal to this:

curl -H 'Accept: */*' 'http://dr.jones.dk/me/'

This is probably what you intended:

curl -H 'Accept: application/rdf+xml, application/rdf+turtle;q=0.5, application/x-turtle;q=0.4,
text/turtle;q=0.3, application/xml;q=0.2, */*;q=0.1' 'http://dr.jones.dk/me/'

...which delivers the RDF/XML format 

Alternatively if you wanted to test _my_ priorities then you should 
leave out the trailing wildcard, like this:

curl -H 'Accept: application/rdf+xml, application/rdf+turtle, application/x-turtle, text/turtle,
application/xml' 'http://dr.jones.dk/me/'

...which delivers the Turtle format.  Which is IMO not "wrong" of my 
setup, but wrong of you if really you favor RDF/XML over Turtle. 

The issue I raised is this:

curl -H 'Accept: application/rdf+xml, application/pgp-signature' 'http://dr.jones.dk/me/'

...which delivers the PGP signature rather than the RDF/XML.

Hmm.  It occurs to me just now that the GPG signature really isn't same 
content in a different format, so should simply use a different stem. 
Will try that after posting this (so the test right above hopefully 
leads to serving the RDF/XML pretty soon).

> RAP's rdfxml parser is way better than its turtle/n3 one, if you could 
> have a look at your http://dr.jones.dk/me/ to make it return RDF/XML 
> when a client says it prefers it then the validator will work, till i 
> look at the n3 parsing.

As argued above I claim that my server _does_ respect RDF/XML favored 
over Turtle - when properly hinted!

> This is the best description of how to set up your apache instance to 
> server up conneg'd RDF:
> 
> http://www.w3.org/TR/swbp-vocab-pub/ 

Thanks.  That is indeed a nice document (I knew it already).  Does not 
include GPG signing in its examples, though, which is (or was) my 
problem.

> > Took me some time to find a method that works both ways: I can 
> > generate RDF and from the RDF generate the exact same Turtle file.  
> > Added that reverse script now as well: rdf2turtle.sh
> 
> Um, I think there is some confusion when you use the term 'RDF', you 
> seem to use it to refer to RDF/XML. This is not the case, 'RDF' is a 
> data model as per the 'RDF Concepts/Abstract syntax' W3C note, RDF/XML 
> (ugly) and Turtle (pretty) are both serialisation of the RDF 
> data-model... A minor point, thought you appreciate it though.

You are right, off course.  And I appreciate being corrected!

> Furthermore, libraptor, and the command line tool which comes with it 
> `rapper`, is totally the tool of awesome you want when converting 
> between the various RDF serialisations.

Agreed. My scripts are essentially small wrappers around rapper.

> You must have that installed on your machine, I recall you pointing to 
> the ubuntu bug report (which I didn't understand) about libraptor1 and 
> libraptor2 dependency stuff.. hrrmm. You should totally check it out, 
> it is an awesome bit of RDF conversion magic. And finally on this 
> rant, I keep saying this `if libraptor can't parse it, it isn't RDF 
> ...` :)

I do not recall that conversation, but most likely I have referred to a 
_Debian_ bug (I am a Debian Developer and use only "the real thing", not 
Ubuntu or any other derivative).

> > Oh, btw: I thought I'd done the WoT setup properly using GPG 
> > signing.  What am I missing there to be "compliant" with your 
> > validator?
> 
> You have the following relevant triples

[details snip]

> Which are fine I guess, but they are leaving "a lot to the 
> imagination", what my validator is checking for is for more of the 
> details of your GPG key to be listed within the RDF,

[working example snipped]

Thanks.  Quite helpful.

No space in my brain to fully grasp that at the moment, though, so will 
postpone further tuning of my FOAF for later: Have a deadline on a 
webdesign for a client to reach before I go to CCCamp11 to promote 
FreedomBox on tuesday and one week forward.

Kind regards,

 - Jonas

P.S.

Gave "Walking dead" a try but is not to the liking of me and my 
girlfriend.  Thanks anyway for the (implicit) suggestion.

--

-- 
 * Jonas Smedegaard - idealist & Internet-arkitekt
 * Tlf.: +45 40843136  Website: http://dr.jones.dk/

 [x] quote me freely  [ ] ask before reusing  [ ] keep private

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