On 2/7/15 9:21 AM, Dimitris Kontokostas wrote:
Dear Kingsley, Martynas, allWe already have a new interface since August 2013 that is integrated with Virtuoso (but not yet deployed to dbpedia.org <http://dbpedia.org>)see http://de.dbpedia.org/page/Tim_Berners-Lee http://commons.dbpedia.org/page/File:Tim_Berners-Lee_closeup.jpg http://nl.dbpedia.org/page/Tim_Berners-Lee (click at the top-right to enable) You can find a related publication in LDOW2014DBpedia Viewer - An Integrative Interface for DBpedia leveraging the DBpedia Service Eco System ( Denis Lukovnikov , Dimitris Kontokostas , Claus Stadler , Sebastian Hellmann , Jens Lehmann )http://events.linkeddata.org/ldow2014/papers/ldow2014_paper_05.pdf
Dimitris,As I've indicated in various posts, its really important for us to be transparent and democratic re., these matters. Personally, I would like the community to have a say in regards to the characteristics they would expect in the default Linked Data Pages for DBpedia. This kind of conversation would be of immense value in regards to practical knowledge exchange.
Here is an example of a simple issue with new Linked Data pages you referenced above:
curl -iLH "Accept: text/turtle" http://nl.dbpedia.org/resource/Tim_Berners-Lee
HTTP/1.1 303 See Other Date: Sat, 07 Feb 2015 20:52:15 GMT Server: Virtuoso/07.10.3207 (Linux) x86_64-unknown-linux-gnu Content-Type: text/html; charset=UTF-8 Accept-Ranges: bytes Location: http://nl.dbpedia.org/page/Tim_Berners-Lee Content-Length: 0 Access-Control-Allow-Origin: * Connection: close HTTP/1.1 200 OK Date: Sat, 07 Feb 2015 20:52:15 GMT Server: Virtuoso/07.10.3207 (Linux) x86_64-unknown-linux-gnu Accept-Ranges: bytes Content-Type: text/turtle; charset=UTF-8 Content-Length: 674 Access-Control-Allow-Origin: * Connection: close @prefix dcterms: <http://purl.org/dc/terms/> . @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . @prefix ldp: <http://www.w3.org/ns/ldp#> . @prefix xsd: <http://www.w3.org/2001/XMLSchema#> . <http://live.nl.dbpedia.org:8877/DAV/VAD/dbpedia/description.vsp>a dcterms:PhysicalResource, <http://www.w3.org/2000/01/rdf-schema#Resource> ;
dcterms:title "description.vsp"; dcterms:creator "dav"; dcterms:created "2013-09-19 18:29:24"; dcterms:modified "2014-02-12 23:20:24"; <http://www.w3.org/ns/posix/stat#mtime> 1392247224 ; <http://www.w3.org/ns/posix/stat#size> 29886 ; rdfs:label "description.vsp".Compared to the current DBpedia pages. And that's before we even get into the UI aesthetics re. Linked Data Discovery patterns:
curl -iLH "Accept: text/turtle" http://dbpedia.org/resource/Tim_Berners-LeeWhich returns a TURTLE representation of the description of the entity identified by the HTTP URI: http://dbpedia.org/resource/Tim_Berners-Lee .
As I said, we should take this opportunity to engage the community en route to a solution that's the product of democratic process.
Kingsley
On Fri, Feb 6, 2015 at 11:15 PM, Kingsley Idehen <[email protected] <mailto:[email protected]>> wrote: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 Link: <http://dbpedia.org/sparql?query=define%20sql%3Adescribe-mode%20%22LOD%22%20%20DESCRIBE%20%3Chttp%3A%2F%2Fdbpedia.org%2Fresource%2FTim_Berners-Lee%3E&output=application%2Frdf%2Bxml>; rel="alternate"; type="application/rdf+xml"; title="Structured Descriptor Document (RDF/XML format)",<http://dbpedia.org/sparql?query=define%20sql%3Adescribe-mode%20%22LOD%22%20%20DESCRIBE%20%3Chttp%3A%2F%2Fdbpedia.org%2Fresource%2FTim_Berners-Lee%3E&output=text%2Fn3>; rel="alternate"; type="text/n3"; title="Structured Descriptor Document (N3/Turtle format)",<http://dbpedia.org/sparql?query=define%20sql%3Adescribe-mode%20%22LOD%22%20%20DESCRIBE%20%3Chttp%3A%2F%2Fdbpedia.org%2Fresource%2FTim_Berners-Lee%3E&output=application%2Frdf%2Bjson>; rel="alternate"; type="application/rdf+json"; title="Structured Descriptor Document (RDF/JSON format)",<http://dbpedia.org/sparql?query=define%20sql%3Adescribe-mode%20%22LOD%22%20%20DESCRIBE%20%3Chttp%3A%2F%2Fdbpedia.org%2Fresource%2FTim_Berners-Lee%3E&output=application%2Fatom%2Bxml>; rel="alternate"; type="application/atom+xml"; title="Structured Descriptor Document (OData/Atom format)",<http://dbpedia.org/sparql?query=define%20sql%3Adescribe-mode%20%22LOD%22%20%20DESCRIBE%20%3Chttp%3A%2F%2Fdbpedia.org%2Fresource%2FTim_Berners-Lee%3E&output=application%2Fodata%2Bjson>; rel="alternate"; type="application/odata+json"; title="Structured Descriptor Document (OData/JSON format)",<http://dbpedia.org/sparql?query=define%20sql%3Adescribe-mode%20%22LOD%22%20%20DESCRIBE%20%3Chttp%3A%2F%2Fdbpedia.org%2Fresource%2FTim_Berners-Lee%3E&output=text%2Fcxml>; rel="alternate"; type="text/cxml"; title="Structured Descriptor Document (CXML format)",<http://dbpedia.org/sparql?query=define%20sql%3Adescribe-mode%20%22LOD%22%20%20DESCRIBE%20%3Chttp%3A%2F%2Fdbpedia.org%2Fresource%2FTim_Berners-Lee%3E&output=text%2Fcsv>; rel="alternate"; type="text/csv"; title="Structured Descriptor Document (CSV format)",<http://dbpedia.org/sparql?query=define%20sql%3Adescribe-mode%20%22LOD%22%20%20DESCRIBE%20%3Chttp%3A%2F%2Fdbpedia.org%2Fresource%2FTim_Berners-Lee%3E&output=application%2Fmicrodata%2Bjson>; rel="alternate"; type="application/microdata+json"; title="Structured Descriptor Document (Microdata/JSON format)",<http://dbpedia.org/sparql?query=define%20sql%3Adescribe-mode%20%22LOD%22%20%20DESCRIBE%20%3Chttp%3A%2F%2Fdbpedia.org%2Fresource%2FTim_Berners-Lee%3E&output=text%2Fhtml>; rel="alternate"; type="text/html"; title="Structured Descriptor Document (HTML+Microdata format)",<http://dbpedia.org/sparql?query=define%20sql%3Adescribe-mode%20%22LOD%22%20%20DESCRIBE%20%3Chttp%3A%2F%2Fdbpedia.org%2Fresource%2FTim_Berners-Lee%3E&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";, <?first>; rel="first", <?last>; rel="last", <?next>; rel="next", <?prev>; rel="prev", <http://dbpedia.org/resource/Tim_Berners-Lee>; rev="describedby" 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] <mailto:[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] <mailto:[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 <http://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 <http://www.openlinksw.com/blog/%7Ekidehen> 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 <http://www.openlinksw.com/blog/%7Ekidehen> 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 <http://www.openlinksw.com/blog/%7Ekidehen> 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 ------------------------------------------------------------------------------ Dive into the World of Parallel Programming. 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-- 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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