Re: [Dbpedia-discussion] New user interface for dbpedia.org

Kingsley Idehen Fri, 06 Feb 2015 13:18:08 -0800

On 2/6/15 3:14 PM, Martynas Jusevičius wrote:

Hey again,


I posted this idea because you suggested so:
https://twitter.com/kidehen/status/543567876402475008

Yes, and I am also now suggesting that we address this issue via a competition, since that's objective and democratic.


I still object to your comments about this being a visualization, any
more than the current "green pages" are. If you care to try, you will
retrieve the origin RDF from the application:

   curl -H "Accept: text/turtle"
http://linkeddatahub.com/?uri=http://dbpedia.org/resource/Tim_Berners-Lee


Why do you think what you are doing is news to me?

See:

[1] http://lod.openlinksw.com/describe/?uri=http://dbpedia.org/resource/Tim_Berners-Lee -- that's been possible for more than 6+ years (that instance has 61+ Billion Triples)

[2] http://linkeddata.uriburner.com/describe/?uri=http://dbpedia.org/resource/Tim_Berners-Lee -- URIBurner instance (which does all the Linked Data proxying that you can imagine).


Re. cURL:

You return:

curl -IH "Accept: text/turtle" http://linkeddatahub.com/?uri=http://dbpedia.org/resource/Tim_Berners-Lee

HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
ETag: "5834a98fa2b19547"
Link: <http://graphity.org/gp#Space>; rel=type
Vary: Accept
Content-Type: text/turtle

DBpedia sequence is as follows (which incorporates "Link:" based relations as an HTTP level notation for RDF:


Basic i.e., no content negotiation:

DBpedia as it stands today:

No Content Negotiation:

curl -IL http://dbpedia.org/resource/Tim_Berners-Lee
HTTP/1.1 303 See Other
Date: Fri, 06 Feb 2015 21:06:46 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 0
Connection: keep-alive
Server: Virtuoso/07.10.3211 (Linux) x86_64-redhat-linux-gnu  VDB
Location: http://dbpedia.org/page/Tim_Berners-Lee
Expires: Fri, 13 Feb 2015 21:06:46 GMT
Cache-Control: max-age=604800

HTTP/1.1 200 OK
Date: Fri, 06 Feb 2015 21:06:46 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 130864
Connection: keep-alive
Vary: Accept-Encoding
Server: Virtuoso/07.10.3211 (Linux) x86_64-redhat-linux-gnu  VDB
Expires: Fri, 13 Feb 2015 21:06:46 GMT

Link: <http://dbpedia.org/data/Tim_Berners-Lee.rdf>; rel="alternate"; type="application/rdf+xml"; title="Structured Descriptor Document (RDF/XML format)", <http://dbpedia.org/data/Tim_Berners-Lee.n3>; rel="alternate"; type="text/n3"; title="Structured Descriptor Document (N3/Turtle format)", <http://dbpedia.org/data/Tim_Berners-Lee.json>; rel="alternate"; type="application/json"; title="Structured Descriptor Document (RDF/JSON format)", <http://dbpedia.org/data/Tim_Berners-Lee.atom>; rel="alternate"; type="application/atom+xml"; title="OData (Atom+Feed format)", <http://dbpedia.org/sparql?default-graph-uri=http%3A%2F%2Fdbpedia.org&query=DESCRIBE+<http://dbpedia.org/resource/Tim_Berners-Lee>&format=text%2Fcsv>; rel="alternate"; type="text/csv"; title="Structured Descriptor Document (CSV format)", <http://dbpedia.org/data/Tim_Berners-Lee.ntriples>; rel="alternate"; type="text/plain"; title="Structured Descriptor Document (N-Triples format)", <http://dbpedia.org/sparql?default-graph-uri=http%3A%2F%2Fdbpedia.org&query=DESCRIBE+<http://dbpedia.org/resource/Tim_Berners-Lee>&output=application%2Fmicrodata%2Bjson>; rel="alternate"; type="application/microdata+json"; title="Structured Descriptor Document (Microdata/JSON format)", <http://dbpedia.org/sparql?default-graph-uri=http%3A%2F%2Fdbpedia.org&query=DESCRIBE+<http://dbpedia.org/resource/Tim_Berners-Lee>&output=text%2Fhtml>; rel="alternate"; type="text/html"; title="Structured Descriptor Document (Microdata/HTML format)", <http://dbpedia.org/sparql?default-graph-uri=http%3A%2F%2Fdbpedia.org&query=DESCRIBE+<http://dbpedia.org/resource/Tim_Berners-Lee>&output=application%2Fld%2Bjson>; rel="alternate"; type="application/ld+json"; title="Structured Descriptor Document (JSON-LD format)", <http://dbpedia.org/resource/Tim_Berners-Lee>; rel="http://xmlns.com/foaf/0.1/primaryTopic";, <http://dbpedia.org/resource/Tim_Berners-Lee>; rev="describedby", <http://mementoarchive.lanl.gov/dbpedia/timegate/http://dbpedia.org/page/Tim_Berners-Lee>; rel="timegate"

Cache-Control: max-age=604800
Accept-Ranges: bytes


No Content Negotiation:

curl -I http://dbpedia.org/describe/?uri=http://dbpedia.org/resource/Tim_Berners-Lee

HTTP/1.1 200 OK
Date: Fri, 06 Feb 2015 21:05:32 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 51424
Connection: keep-alive
Vary: Accept-Encoding
Server: Virtuoso/07.10.3211 (Linux) x86_64-redhat-linux-gnu  VDB
Accept-Ranges: bytes
Cache-Control: max-age=604800
Pragma: no-cache



TURTLE content negotiation:

curl -ILH "Accept: text/turtle" http://dbpedia.org/describe/?uri=http://dbpedia.org/resource/Tim_Berners-Lee

Since DBpedia is having some issues today, you can also repeat the above using URIBurner or the LOD cloud cnames in the cURL URIs :



Via URIBurner:

curl -I http://linkeddata.uriburner.com/describe/?uri=http://dbpedia.org/resource/Tim_Berners-Lee

N3/Turtle (* bug re., obsolete text/rdf+n3" [which should be "text/turtle" ] hasn't been applied to this instance *) Negotiaion :

curl -ILH "Accept: text/rdf+n3" http://linkeddata.uriburner.com/describe/?uri=http://dbpedia.org/resource/Tim_Berners-Lee

HTTP/1.1 303 See Other
Server: Virtuoso/07.50.3211 (Linux) x86_64-redhat-linux-gnu  VDB
Connection: Keep-Alive
Content-Type: text/html; charset=UTF-8
Date: Fri, 06 Feb 2015 20:54:58 GMT
Accept-Ranges: bytes
TCN: choice
Vary: negotiate,accept

Location: http://linkeddata.uriburner.com/sparql?query=define%20sql%3Adescribe-mode%20%22LOD%22%20%20DESCRIBE%20%3Chttp%3A%2F%2Fdbpedia.org%2Fresource%2FTim_Berners-Lee%3E&format=text%2Frdf%2Bn3

Content-Length: 0

HTTP/1.1 200 OK
Server: Virtuoso/07.50.3211 (Linux) x86_64-redhat-linux-gnu  VDB
Connection: Keep-Alive
Date: Fri, 06 Feb 2015 20:54:58 GMT
Accept-Ranges: bytes
Content-Type: text/rdf+n3; charset=UTF-8
Content-Length: 251


What you see is the application working in browser/proxy mode.


Again, that isn't news to me :)

  If you
would deploy it on http://dbpedia.org/resource/ and back it with
DBPedia SPARQL endpoint, it would be a Linked Data server which also
happens to have the same (X)HTML view. What else do you expect?

Please understand my comments. Bottom line, you are not the only person working on Linked Open Data tools. There are many folks working on lots of tools in this space. If you feel strongly about your product, then why not make your case democratically?

For instance, at OpenLink Software, we practice what we preach. We could have replaced the green pages in 2008, but we didn't feel that was democratic. Thus, we've simply been waiting for a better time to resurrect the need for alternatives to the default DBpedia Linked Data Pages.

Again, an open competition would provide a variety of benefits to the community at large. We certainly need to have DBpedia's default HTML interface (which is a Linked Data Browser in HTML) updated.


Fine, lets do a competition!

Good! First step would be to describe what's expected of the default Linked Data page. Ideally, that can be constructed in an TURTLE document :)



Kingsley


On Fri, Feb 6, 2015 at 9:00 PM, Kingsley  Idehen <[email protected]> wrote:

On 2/6/15 2:12 PM, Martynas Jusevičius wrote:

Kingsley,

with all due respect, what are you talking about? What visualization?
Did you look at the example?


Yes, of course I looked at the example. It's an HTML page. Just like the
DBpedia green pages are HTML pages.

HTML pages are ultimately visualization of data encoded using HTML
(Hypertext Markup Language).

It is a generic Linked Data browser interface, which also can be used
to publish Linked Data datasets such as DBPedia. All it uses to render
the page is the RDF result it retrieves from the source.


It is a Document endowed with controls (courtesy of HTML). The controls in
question enable a user lookup HTTP URIs that identity the subject,
predicates, and objects of relations represented using RDF statements.
That's it!

As to "why?" -- because it is much more user-friendly? Is that not a
goal for DBPedia?


And as I said "user-friendly" has nothing to do with it. Even more so when
you are making an utterly subjective qualification -- in a realm that's
supposed to be underpinned by objectivity, courtesy  of entity relation
semantics comprehension.

Let me hear about non-obvious capabilities that are required, and see
if we can meet them. We're offering to contribute open-source code.


You are not the only one that would like to offer an alternative default to
the pages that visualize the entity descriptions in DBpedia's Linked Open
Data Space. Hence my suggestion of an open competition, which would actually
do this project a world of good, ditto the Linked Open Data community in
general.

The community can vote on their preferred default visualization, how about
that? Totally open and objective :)


Kingsley


Martynas

On Fri, Feb 6, 2015 at 8:00 PM, Kingsley  Idehen <[email protected]>
wrote:

On 2/6/15 11:46 AM, Martynas Jusevičius wrote:

Hey all,

as some of you might know, our company has been developing Graphity -
an open-source Linked Data client, which provides browser
functionality and more.

Here's an instance of it running on Linked Data Hub, rendering DBPedia
resource of Tim Berners-Lee:


http://linkeddatahub.com/?uri=http%3A%2F%2Fdbpedia.org%2Fresource%2FTim_Berners-Lee

You can compare it with the current interface:
http://dbpedia.org/page/Tim_Berners-Lee

I think it is safe to say that user-friendliness is on another level.

Also check out the SPARQL endpoint which contains an interactive query
editor.

I would like the DBPedia community to consider making Graphity the
default Linked Data interface.


Why? You are adding a visualization to the mix. The tool in question is
already listed on the applications collection[1] page currently
maintained
for the project.

Please remember, Linked Open Data is all about loosely-coupling the
following:

1. Object (Entity) Identity
2. Object (Entity) Description Location -- basically the Name->Address
indirection that's crucial to any Identity based system
3. Notation used to construct Object (Entity) Descriptions
4. Wire-Protocol used to serialize Object (Entity) Descriptionsover a
network
5. Data Access Tools for interrogating, manipulating, and visualizing
Object
(Entity) Descriptions.

DBpedia publishes 5-Star Linked Open Data. You, like many others, have
built
a nice data visualization tool. Great job! But that isn't a mutually
exclusive endeavor relative to DBpedia (the data space), it's a nice
addition to the mix :)

Do we need an upgrade of the default green pages? Of course! Getting that
rolled out is something that's been looping for a while because the
capabilities required are a little more challenging than is obvious.

Maybe, at some point, we could have a competition for the community to
vote
on re., new default interface. The beauty of said competition is that
outlining the expectations provides a nice route to actually discussing
Linked Open Data visualization matters, clearly etc..

After that, we could take things much
further: enable editing mode, add custom layout modes etc.

Please let me know what you think. The source code can be found here:
https://github.com/Graphity/linked-data-hub
https://github.com/Graphity/graphity-client


Best regards,

Martynas
graphityhq.com

Links:

[1] http://wiki.dbpedia.org/Applications -- DBpedia Applications .

--
Regards,

Kingsley Idehen
Founder & CEO
OpenLink Software
Company Web:http://www.openlinksw.com
Personal Weblog 1:http://kidehen.blogspot.com
Personal Weblog 2:http://www.openlinksw.com/blog/~kidehen
Twitter Profile:https://twitter.com/kidehen
Google+ Profile:https://plus.google.com/+KingsleyIdehen/about
LinkedIn Profile:http://www.linkedin.com/in/kidehen
Personal WebID:http://kingsley.idehen.net/dataspace/person/kidehen#this


--
Regards,

Kingsley Idehen
Founder & CEO
OpenLink Software
Company Web: http://www.openlinksw.com
Personal Weblog 1: http://kidehen.blogspot.com
Personal Weblog 2: http://www.openlinksw.com/blog/~kidehen
Twitter Profile: https://twitter.com/kidehen
Google+ Profile: https://plus.google.com/+KingsleyIdehen/about
LinkedIn Profile: http://www.linkedin.com/in/kidehen
Personal WebID: http://kingsley.idehen.net/dataspace/person/kidehen#this



--
Regards,

Kingsley Idehen 
Founder & CEO
OpenLink Software
Company Web: http://www.openlinksw.com
Personal Weblog 1: http://kidehen.blogspot.com
Personal Weblog 2: http://www.openlinksw.com/blog/~kidehen
Twitter Profile: https://twitter.com/kidehen
Google+ Profile: https://plus.google.com/+KingsleyIdehen/about
LinkedIn Profile: http://www.linkedin.com/in/kidehen
Personal WebID: http://kingsley.idehen.net/dataspace/person/kidehen#this

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Re: [Dbpedia-discussion] New user interface for dbpedia.org

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