Re: New LOD Cloud - Please send us links to missing data sources
Hi all, thanks for all your input. The LOD Cloud as of March 2009 is final and online. You can find it over at http://esw.w3.org/topic/SweoIG/TaskForces/CommunityProjects/LinkingOpenData along with a colored by topic version and various formats. I will update the dataset table and put a linkage table on the dataset page later today. It would be extremely useful keeping these tables up to date. Anja Anja Jentzsch schrieb: Hi all, we are currently updating the LOD cloud. Find the draft here: http://www4.wiwiss.fu-berlin.de/bizer/pub/lod-datasets_2009-02-27.png We have already added: 1. the RKBExplorer cloud 2. the Bio2RDF cloud 3. the LODD cloud 4. GeoSpecies 5. LIBRIS Statistics on triple and link count (as well as target sources) are missing for the following sources: - Faviki - RDFohloh - OpenCalais - LIBRIS Did we forget any new data sources or links between data sources? Keep in mind: A data source qualifies for the cloud, if the data is available via dereferencable URIs and if the data source is interlinked with at least one other source (meaning it references URIs within the namespace of the other source). Anja
Re: AW: New LOD Cloud - Please send us links to missing data sources
Hello, Having just seen the bigger and better LOD cloud [1]. I was wondering whether QDOS should have a link to DBpedia, as we emit owl:sameAs relationships from celebs to dbpedia resources: see Barak Obama's turtle file [2]. QDOS currently has around 100,000 people, about half of which are linked to dbpedia resources. Cheers, Mischa [1] http://www4.wiwiss.fu-berlin.de/bizer/pub/lod-datasets_2009-02-27.png [2] http://qdos.com/celeb/Barack-Obama/6050a1f1a818bf959f70afbd46273dea/turtle On 28 Feb 2009, at 09:03, Chris Bizer wrote: Hi Kingsley, You have MySpace and Flickr Wrappers but still don't include all the Virtuoso Sponger Cartridges (which are wrappers) to the Cloud [1] ? The last time I checked the cartridges, I had the impression that they were not very much interlinked with the rest of the LOD cloud and about half of them were down. The links to DBpedia were rather strange. For instance the first link I found owl:sameAs'ed Yahoo finance balance sheet with Dbpedia bed sheet, which is even for me as a big supporter of owl:sameAs links a bit too much Semantic gap. Did you improve the quality of the external links in the meantime and do the cartridges regularly deliver data? Another problem is that many of the sources are not really Open Data as various license restrictions apply. Cheers Chris -Ursprüngliche Nachricht- Von: public-lod-requ...@w3.org [mailto:public-lod-requ...@w3.org] Im Auftrag von Kingsley Idehen Gesendet: Samstag, 28. Februar 2009 00:18 An: Anja Jentzsch Cc: public-lod@w3.org Betreff: Re: New LOD Cloud - Please send us links to missing data sources Anja Jentzsch wrote: Hi all, we are currently updating the LOD cloud. Find the draft here: http://www4.wiwiss.fu-berlin.de/bizer/pub/lod-datasets_2009-02-27.png We have already added: 1. the RKBExplorer cloud 2. the Bio2RDF cloud 3. the LODD cloud 4. GeoSpecies 5. LIBRIS Statistics on triple and link count (as well as target sources) are missing for the following sources: - Faviki - RDFohloh - OpenCalais - LIBRIS Did we forget any new data sources or links between data sources? Keep in mind: A data source qualifies for the cloud, if the data is available via dereferencable URIs and if the data source is interlinked with at least one other source (meaning it references URIs within the namespace of the other source). Anja Anja, You have MySpace and Flickr Wrappers but still don't include all the Virtuoso Sponger Cartridges (which are wrappers) to the Cloud [1] ? Also, the LODD data sets page should be linked to: http://esw.w3.org/topic/DataSetRDFDumps, so we can track down the dumps with ease re. the Virtuoso LOD hosting instance. links: 1. http://virtuoso.openlinksw.com/images/sponger-cloud.html -- Regards, Kingsley Idehen Weblog: http://www.openlinksw.com/blog/~kidehen President CEO OpenLink Software Web: http://www.openlinksw.com ___ Mischa Tuffield Email: mischa.tuffi...@garlik.com Homepage - http://mmt.me.uk/ FOAF URI - http://mmt.me.uk/foaf.rdf#mischa PGP.sig Description: This is a digitally signed message part
RE: AW: New LOD Cloud - Please send us links to missing data sources
I think you should be - esp. as you also connect to the BBC linked data with stuff like: lastfm:favouriteArtist rdf:resource=http://www.bbc.co.uk/music/artists/e60e1f0b-1e8c-45e7-9d4a-222db9cb34f7#artist/ in the FOAF profiles you generate. John -Original Message- From: public-lod-requ...@w3.org on behalf of mis...@garlik Sent: Tue 03/03/2009 10:53 To: public-lod@w3.org Subject: Re: AW: New LOD Cloud - Please send us links to missing data sources Hello, Having just seen the bigger and better LOD cloud [1]. I was wondering whether QDOS should have a link to DBpedia, as we emit owl:sameAs relationships from celebs to dbpedia resources: see Barak Obama's turtle file [2]. QDOS currently has around 100,000 people, about half of which are linked to dbpedia resources. Cheers, Mischa [1] http://www4.wiwiss.fu-berlin.de/bizer/pub/lod-datasets_2009-02-27.png [2] http://qdos.com/celeb/Barack-Obama/6050a1f1a818bf959f70afbd46273dea/turtle On 28 Feb 2009, at 09:03, Chris Bizer wrote: Hi Kingsley, You have MySpace and Flickr Wrappers but still don't include all the Virtuoso Sponger Cartridges (which are wrappers) to the Cloud [1] ? The last time I checked the cartridges, I had the impression that they were not very much interlinked with the rest of the LOD cloud and about half of them were down. The links to DBpedia were rather strange. For instance the first link I found owl:sameAs'ed Yahoo finance balance sheet with Dbpedia bed sheet, which is even for me as a big supporter of owl:sameAs links a bit too much Semantic gap. Did you improve the quality of the external links in the meantime and do the cartridges regularly deliver data? Another problem is that many of the sources are not really Open Data as various license restrictions apply. Cheers Chris -Ursprüngliche Nachricht- Von: public-lod-requ...@w3.org [mailto:public-lod-requ...@w3.org] Im Auftrag von Kingsley Idehen Gesendet: Samstag, 28. Februar 2009 00:18 An: Anja Jentzsch Cc: public-lod@w3.org Betreff: Re: New LOD Cloud - Please send us links to missing data sources Anja Jentzsch wrote: Hi all, we are currently updating the LOD cloud. Find the draft here: http://www4.wiwiss.fu-berlin.de/bizer/pub/lod-datasets_2009-02-27.png We have already added: 1. the RKBExplorer cloud 2. the Bio2RDF cloud 3. the LODD cloud 4. GeoSpecies 5. LIBRIS Statistics on triple and link count (as well as target sources) are missing for the following sources: - Faviki - RDFohloh - OpenCalais - LIBRIS Did we forget any new data sources or links between data sources? Keep in mind: A data source qualifies for the cloud, if the data is available via dereferencable URIs and if the data source is interlinked with at least one other source (meaning it references URIs within the namespace of the other source). Anja Anja, You have MySpace and Flickr Wrappers but still don't include all the Virtuoso Sponger Cartridges (which are wrappers) to the Cloud [1] ? Also, the LODD data sets page should be linked to: http://esw.w3.org/topic/DataSetRDFDumps, so we can track down the dumps with ease re. the Virtuoso LOD hosting instance. links: 1. http://virtuoso.openlinksw.com/images/sponger-cloud.html -- Regards, Kingsley Idehen Weblog: http://www.openlinksw.com/blog/~kidehen President CEO OpenLink Software Web: http://www.openlinksw.com ___ Mischa Tuffield Email: mischa.tuffi...@garlik.com Homepage - http://mmt.me.uk/ FOAF URI - http://mmt.me.uk/foaf.rdf#mischa . This email is only intended for the person to whom it is addressed and may contain confidential information. If you have received this email in error, please notify the sender and delete this email which must not be copied, distributed or disclosed to any other person. Unless stated otherwise, the contents of this email are personal to the writer and do not represent the official view of Ordnance Survey. Nor can any contract be formed on Ordnance Survey's behalf via email. We reserve the right to monitor emails and attachments without prior notice. Thank you for your cooperation. Ordnance Survey Romsey Road Southampton SO16 4GU Tel: 08456 050505 http://www.ordnancesurvey.co.uk
Re: AW: New LOD Cloud - Please send us links to missing data sources
Hi everyone, I was looking at the linked data cloud visualization the other day when Chris Bizer posted it to this mailing list - http://tinyurl.com/b4vfbq . I started to gather all the structural communities that I found by eye into different sets. If you are interested, here is a blog entry containing the sets: http://tinyurl.com/cr3xj5 Then I decided to do a graph analysis computationally. The graph analysis article can be found here: http://arxiv.org/abs/0903.0194 Someone on this mailing list mentioned how difficult it is to decipher the connectivity of the PNG visualization. For me, it was very tedious and painstaking to turn the visualization into a graph data structure. My attempt at completeness is visualized on page 7 of the article. Take care, Marko A. Rodriguez http://markorodriguez.com
Analyzing the success of LOD (was: New LOD Cloud - Please send us links to missing data sources)
Andraz: That the bubbles continue to grown is however a sociological interesting phenomen :-) And a good sign that something has gone right :) Giovanni: Maybe :-) but people do things for many other reason that they're right. I think the LOD project is a great success. It is a very lively community, there has been significant progress over the last year (amount of data, quality of underlying technologies such as Virtuoso). However, the community should take some time to analyze WHY it is successful, and why it is more successful than attempts of using RDF/OWL before 2007. Some thoughts on this: * The main ingredient to the success of LOD is that it is relatively centralized. It would not work without DBpedia serving as the 'nucleus' of the cloud. It would not work without someone dedicated to drawing the clould diagram that everyone is happy to show on Powerpoint slides. It would not work without this mailing list that serves an open platform for the community. However, I have the impression that some key persons in the LOD community might not be happy about this reason for success at all. For them, the LOD project is a mere testing ground for the next generation of the entire web, and showing that linked data works in a decentralized way is a crucial aspect of this vision. The fact that the current LOD cloud was actually produced in a rather centralized process, and that most of the valuable data sources in the LOD cloud are actually under the control of a very small number of stakeholders, is seen as a transient blemish, at best. However, I think that this is a problematic situation, and we should embrace the semi-centralized nature of the LOD project, rather than hiding it away. Having a close-knit group of stakeholders that contribute to a partly distributed, partly centralized knowledge base might actually be a very interesting endeavor -- and it might be a way to provide a clear incentive to participate. LOD could be a novel type of open-source project, one that is not only concerned with code, but also with the underlying data. The products of this open source project could then be used in various kinds of projects, some of them with commercial focus. In such a scenario, being the main stakeholder for a certain subset of LOD might become profitable, and give incentive to improve the data provided and controlled by each stakeholder. This business model could be similar to that of successful open source content management systems such as Typo3 or Drupal, where the code is free, but providing consulting and customization for certain commercial users is based on financial support. I know that this idea of a 'LOD brand' counters the main motivation of most people in the community, but it might be the key to creating an incentive structure for providing linked data, improving data quality and actually getting people to use the data. With the current philosophy, I see the danger of LOD staying a permanent 'proof of concept'. The concept has been proved by now. * A good point by Giovanni is that mere interlinking of datasets was possible since 1999 by re-using URIs, and that post-hoc mapping between datasets was possible since 2004, when owl:sameAs was invented. The linked data movement 'only' added the consensus that HTTP URIs should be used, and that a HTTP GET request should yield a small RDF subgraph, listing the RDF triples about the resource. Surely, this is a very practical thing for many reasons, but was it instrumental for the success of LOD? At the moment, it seems that most *useful* applications of LOD data are based on a central triple store created by the aggregation of some or all LOD data sources. In that case, one might ask whether the dereferenceable URIs are really an essential ingredient to the success or LOD, or just a 'good to have', but not essential, feature. Giovanni: An alternative explanation i like is http://inamidst.com/whits/2008/technobunkum This is the second time I see this link on this mailing list. He makes some very good points about the importance of focusing on providing solutions to problems, instead of becoming too tangled up in technicalities. I also read his other text on http://inamidst.com/whits/2008/ambient which gives a lot of insight into why he has abandoned Semantic Web technologies. I guess the problems he likes to see solved are too trivial to require a paradigmatic change (such as a global trend towards RDF/OWL and linked data). However, I would not generalize this experience to yield the conclusion that the Semantic Web is a huge case of 'Technobunkum' (what a silly term, by the way). The fact that not every tiny little problem on the web might be in need of Semantic Web technologies does not mean that these technologies are worthless. There are plenty of real use cases in important business segments and companies where there is dire need for such new technologies -- life
Re: New LOD Cloud - Please send us links to missing data sources
Andraz Tori wrote: On Mon, 2009-03-02 at 01:54 +0100, Giovanni Tummarello wrote: Hi Andreaz :-) I don't see the difference between the LOD model and the data (including links) itself. At least to us at Zemanta it is immensely helpful to have a lot of those links done. It brings down the cost of doing really innovative stuff to us and I believe to many others too. We don't dereference them in real-time, but ahead-of-time to produce specialized datasets, but I don't think that makes a difference. to the risk of being pedantic.. Well the idea from the day 0 of the semantic web was that entity would be interlinked by the reuse of the same URI. linking or putting a same as is the same thing so nothing new. the new part of LOD would be the publishing of a dataset as many individual RDF description corresponding to the resolution of each URI/URL. and that part is not being useful to you I wasn't here at its conception, so I can only talk about current situation. Currently this is only a part of a bargain, but not the whole thing. The other part is actually having some concrete set of federated generally-interesting datasets that are interconnected instead of abstract vision or one-off efforts. So LOD is actually people working 'together' to get something practical out of larger SW idea. I also think that LOD has started to cause the Network effect. Every new dataset makes others more usable. That the bubbles continue to grown is however a sociological interesting phenomen :-) And a good sign that something has gone right :) Maybe :-) but people do things for many other reason that they're right. An alternative explanation i like is http://inamidst.com/whits/2008/technobunkum I disagree LOD is this kind of a beast. Services like ours are proving LOD is important for 'mainstream'. While it is a stretch to say our service is (already) mainstream or that LOD is the main enabler, it is definitely meant for mainstream and LOD plays a certain part in making it achievable (cheaply enough). I think LOD achievement is enormous and this is only the start. :) Said picture might have helped to get a lot of RDF data online. This is undoubtly a great achievement But sustenability and real growth comes only if we can prove real reasons for people to publish this data, and in this way. While we havent yet seen this, this doesnt mean that some application might not exist we're on exactly the same page here! Sustainability and growth depend on working incentives for publishers to publish the data. And there is just one thing (commercial) publishers care about - direct and indirect traffic. If a good incentive is getting more links from bloggers (which in turn brings traffic and increases different rankings), there you have one in Zemanta. Ok, actually it is only a potential, since we include datasets on one-by-one basis. But when a company approaches us to incorporate their links into our suggestion pool the first question we ask is: Do you have proper connections into LOD? It makes everything so much easier. To date bloggers have created more than a million permanent hyperlinks with Zemanta. For some links the ability to suggest them came from the fact that the LOD data and links were available. I am sure there must be some other LOD related services that in the 'end consequence' bring traffic to the publishers. We are working on at least another one - Simple Semantic Tagging. bye andraz Andraz, I agree with your points and general sentiment. One issue we need to address is the LOD cloud. Personally, there are vital aspects of the big picture that is completely misses. 1. UMBEL - this is the data dictionary aspect of the Linked Data Web and it meshes disparate ontologies (one aspect) and also provides a concept scheme (its other aspect) 2. Dynamic Linked Data - our sponger cartridges perform lookups and joins against other data providers (as you can see re. Zemanta cartridge) . When you combine the main cloud, #1, and #2, you basically moot any questions about the state of the Linked Data Web. Instead, we move over to more interesting and important issues such as quality of data within the Linked Data Web. Quality is valuable and an opportunity for any Linked Data Web player to innovate. Show me an entrepreneur and I will show you someone who is knowingly or unknowingly using DBMS technology to provide unique value to his/her customer base via queries, lookups, and joins :-) Kingsley Giovanni -- Regards, Kingsley Idehen Weblog: http://www.openlinksw.com/blog/~kidehen President CEO OpenLink Software Web: http://www.openlinksw.com
FW: New LOD Cloud - Please send us links to missing data sources
Some missing links... My pub guide (which I still need to tidy up) is linked to revyu and vice versa (ok it is only 2 links). The pub guide is currently linked to the OS Admin Geography data in RKBEXplorer and not geonames (geonames links may be forthcoming). I also have links from my FOAF profiles to OS Admin Geography in RKB Explorer and to the BBC music linked data. cheers John -Original Message- From: public-lod-requ...@w3.org on behalf of Anja Jentzsch Sent: Fri 27/02/2009 22:58 To: public-lod@w3.org Subject: New LOD Cloud - Please send us links to missing data sources Hi all, we are currently updating the LOD cloud. Find the draft here: http://www4.wiwiss.fu-berlin.de/bizer/pub/lod-datasets_2009-02-27.png We have already added: 1. the RKBExplorer cloud 2. the Bio2RDF cloud 3. the LODD cloud 4. GeoSpecies 5. LIBRIS Statistics on triple and link count (as well as target sources) are missing for the following sources: - Faviki - RDFohloh - OpenCalais - LIBRIS Did we forget any new data sources or links between data sources? Keep in mind: A data source qualifies for the cloud, if the data is available via dereferencable URIs and if the data source is interlinked with at least one other source (meaning it references URIs within the namespace of the other source). Anja . This email is only intended for the person to whom it is addressed and may contain confidential information. If you have received this email in error, please notify the sender and delete this email which must not be copied, distributed or disclosed to any other person. Unless stated otherwise, the contents of this email are personal to the writer and do not represent the official view of Ordnance Survey. Nor can any contract be formed on Ordnance Survey's behalf via email. We reserve the right to monitor emails and attachments without prior notice. Thank you for your cooperation. Ordnance Survey Romsey Road Southampton SO16 4GU Tel: 08456 050505 http://www.ordnancesurvey.co.uk
Re: New LOD Cloud - Please send us links to missing data sources
Hugh Glaser wrote: I take you point, Giovanni, but I have to say it: http://www.rkbexplorer.com/ uses a good 30 different bubbles on the (new) diagram, without collecting them into a single store, and using the URI linkage. From the LOD publicity point of view, it is unfortunate that you can't tell (I hope). But that was one of the objectives:- a user of LOD should be able to be blissfully unaware that they are using LOD. Vital point: Users should be blissfully unaware that they are using LOD. They should simply feel the FORCE [1] :-) Links: 1. http://www.openlinksw.com/dataspace/kide...@openlinksw.com/weblog/kide...@openlinksw.com%27s%20blog%20%5b127%5d/1474 -- post about the FORCE . Kingsley Cheers Hugh On 01/03/2009 00:30, Giovanni Tummarello g.tummare...@gmail.com wrote: congrats and kudos to all those who've made this happen. I think the cloud diagrams are proving a very compelling visual for people who don't care about nerdy detail but understand the idea of interlinked datasets. Yes they're great for handwaving if the audience has never seen it, otherwise its likely counterproductive The problem is that LOD has been stuck here 2 years really now, not a single advance not a single application (of the LOD model, not of the data, the data is obviously useful and expressing in RDF is also starting to be seen as useful) . That the bubbles continue to grown is however a sociological interesting phenomen :-) On the positive side, i recently reviewed some work by someone who has a very interesting way to create a diagram which actually helps by showing which queries can be asked. Too bad you wont see it in action at ESWC because the demo paper was not up to the springer standards for legibility, according to some other reviewer. Giovanni -- Regards, Kingsley Idehen Weblog: http://www.openlinksw.com/blog/~kidehen President CEO OpenLink Software Web: http://www.openlinksw.com
Re: New LOD Cloud - Please send us links to missing data sources
Hi Andreaz :-) I don't see the difference between the LOD model and the data (including links) itself. At least to us at Zemanta it is immensely helpful to have a lot of those links done. It brings down the cost of doing really innovative stuff to us and I believe to many others too. We don't dereference them in real-time, but ahead-of-time to produce specialized datasets, but I don't think that makes a difference. to the risk of being pedantic.. Well the idea from the day 0 of the semantic web was that entity would be interlinked by the reuse of the same URI. linking or putting a same as is the same thing so nothing new. the new part of LOD would be the publishing of a dataset as many individual RDF description corresponding to the resolution of each URI/URL. and that part is not being useful to you That the bubbles continue to grown is however a sociological interesting phenomen :-) And a good sign that something has gone right :) Maybe :-) but people do things for many other reason that they're right. An alternative explanation i like is http://inamidst.com/whits/2008/technobunkum I think LOD achievement is enormous and this is only the start. :) Said picture might have helped to get a lot of RDF data online. This is undoubtly a great achievement But sustenability and real growth comes only if we can prove real reasons for people to publish this data, and in this way. While we havent yet seen this, this doesnt mean that some application might not exist Giovanni
AW: New LOD Cloud - Please send us links to missing data sources
Hi Kingsley, You have MySpace and Flickr Wrappers but still don't include all the Virtuoso Sponger Cartridges (which are wrappers) to the Cloud [1] ? The last time I checked the cartridges, I had the impression that they were not very much interlinked with the rest of the LOD cloud and about half of them were down. The links to DBpedia were rather strange. For instance the first link I found owl:sameAs'ed Yahoo finance balance sheet with Dbpedia bed sheet, which is even for me as a big supporter of owl:sameAs links a bit too much Semantic gap. Did you improve the quality of the external links in the meantime and do the cartridges regularly deliver data? Another problem is that many of the sources are not really Open Data as various license restrictions apply. Cheers Chris -Ursprüngliche Nachricht- Von: public-lod-requ...@w3.org [mailto:public-lod-requ...@w3.org] Im Auftrag von Kingsley Idehen Gesendet: Samstag, 28. Februar 2009 00:18 An: Anja Jentzsch Cc: public-lod@w3.org Betreff: Re: New LOD Cloud - Please send us links to missing data sources Anja Jentzsch wrote: Hi all, we are currently updating the LOD cloud. Find the draft here: http://www4.wiwiss.fu-berlin.de/bizer/pub/lod-datasets_2009-02-27.png We have already added: 1. the RKBExplorer cloud 2. the Bio2RDF cloud 3. the LODD cloud 4. GeoSpecies 5. LIBRIS Statistics on triple and link count (as well as target sources) are missing for the following sources: - Faviki - RDFohloh - OpenCalais - LIBRIS Did we forget any new data sources or links between data sources? Keep in mind: A data source qualifies for the cloud, if the data is available via dereferencable URIs and if the data source is interlinked with at least one other source (meaning it references URIs within the namespace of the other source). Anja Anja, You have MySpace and Flickr Wrappers but still don't include all the Virtuoso Sponger Cartridges (which are wrappers) to the Cloud [1] ? Also, the LODD data sets page should be linked to: http://esw.w3.org/topic/DataSetRDFDumps, so we can track down the dumps with ease re. the Virtuoso LOD hosting instance. links: 1. http://virtuoso.openlinksw.com/images/sponger-cloud.html -- Regards, Kingsley Idehen Weblog: http://www.openlinksw.com/blog/~kidehen President CEO OpenLink Software Web: http://www.openlinksw.com
Re: New LOD Cloud - Please send us links to missing data sources
Anja, as in previous steps, I am happy to generate an SVG version as soon as I get the final PDF version! Just ping me... Cheers Ivan Anja Jentzsch wrote: Hi all, we are currently updating the LOD cloud. Find the draft here: http://www4.wiwiss.fu-berlin.de/bizer/pub/lod-datasets_2009-02-27.png We have already added: 1. the RKBExplorer cloud 2. the Bio2RDF cloud 3. the LODD cloud 4. GeoSpecies 5. LIBRIS Statistics on triple and link count (as well as target sources) are missing for the following sources: - Faviki - RDFohloh - OpenCalais - LIBRIS Did we forget any new data sources or links between data sources? Keep in mind: A data source qualifies for the cloud, if the data is available via dereferencable URIs and if the data source is interlinked with at least one other source (meaning it references URIs within the namespace of the other source). Anja -- Ivan Herman, W3C Semantic Web Activity Lead Home: http://www.w3.org/People/Ivan/ mobile: +31-641044153 PGP Key: http://www.ivan-herman.net/pgpkey.html FOAF: http://www.ivan-herman.net/foaf.rdf smime.p7s Description: S/MIME Cryptographic Signature
Re: New LOD Cloud - Please send us links to missing data sources
Not related to this thread, but this just in: The LOD cloud was just on a slide presented at http://transparencycamp.org for the future of http://www.recovery.gov, the website for tracking spending in the U.S.'s economic recovery package. Very thrilling to see it being taken seriously by the U.S. government. Josh
Re: AW: New LOD Cloud - Please send us links to missing data sources
Chris Bizer wrote: Hi Kingsley, You have MySpace and Flickr Wrappers but still don't include all the Virtuoso Sponger Cartridges (which are wrappers) to the Cloud [1] ? The last time I checked the cartridges, I had the impression that they were not very much interlinked with the rest of the LOD cloud and about half of them were down. That was a point in time. The links to DBpedia were rather strange. For instance the first link I found owl:sameAs'ed Yahoo finance balance sheet with Dbpedia bed sheet, which is even for me as a big supporter of owl:sameAs links a bit too much Semantic gap. We have 30 RDfizers written at different points in time. If an RDFizer is imperfect (like most of LOD) simple feedback will do. I don't even remember the last time I looked the RDFizer for Yahoo Finance. Okay, one bad and very very old cartridge, 29 to go :-) Did you improve the quality of the external links in the meantime and do the cartridges regularly deliver data? If OpenLink has one attribute, I don't think static would be the one :-) These cartridges changes on a daily basis depending on a myriad of circumstances (including feedback). As with all things, feedback would be very helpful. Another problem is that many of the sources are not really Open Data as various license restrictions apply. The ones that concern you re. open data to should be relayed to me, at the very least we don't want to be violating anyones publishing rules etc.. Kingsley Cheers Chris -Ursprüngliche Nachricht- Von: public-lod-requ...@w3.org [mailto:public-lod-requ...@w3.org] Im Auftrag von Kingsley Idehen Gesendet: Samstag, 28. Februar 2009 00:18 An: Anja Jentzsch Cc: public-lod@w3.org Betreff: Re: New LOD Cloud - Please send us links to missing data sources Anja Jentzsch wrote: Hi all, we are currently updating the LOD cloud. Find the draft here: http://www4.wiwiss.fu-berlin.de/bizer/pub/lod-datasets_2009-02-27.png We have already added: 1. the RKBExplorer cloud 2. the Bio2RDF cloud 3. the LODD cloud 4. GeoSpecies 5. LIBRIS Statistics on triple and link count (as well as target sources) are missing for the following sources: - Faviki - RDFohloh - OpenCalais - LIBRIS Did we forget any new data sources or links between data sources? Keep in mind: A data source qualifies for the cloud, if the data is available via dereferencable URIs and if the data source is interlinked with at least one other source (meaning it references URIs within the namespace of the other source). Anja Anja, You have MySpace and Flickr Wrappers but still don't include all the Virtuoso Sponger Cartridges (which are wrappers) to the Cloud [1] ? Also, the LODD data sets page should be linked to: http://esw.w3.org/topic/DataSetRDFDumps, so we can track down the dumps with ease re. the Virtuoso LOD hosting instance. links: 1. http://virtuoso.openlinksw.com/images/sponger-cloud.html -- Regards, Kingsley Idehen Weblog: http://www.openlinksw.com/blog/~kidehen President CEO OpenLink Software Web: http://www.openlinksw.com
Re: New LOD Cloud - Please send us links to missing data sources
On 28/2/09 21:49, Joshua Tauberer wrote: Not related to this thread, but this just in: The LOD cloud was just on a slide presented at http://transparencycamp.org for the future of http://www.recovery.gov, the website for tracking spending in the U.S.'s economic recovery package. Very thrilling to see it being taken seriously by the U.S. government. This is great news! And since my last couple of threads here have been grumbles about this or that detail, I just want to say congrats and kudos to all those who've made this happen. I think the cloud diagrams are proving a very compelling visual for people who don't care about nerdy detail but understand the idea of interlinked datasets. BTW I also showed some of the clouds during a panel talk in last week's HURIDOCS conference on human rights documentation (Human Rights Council and the International Criminal Court: The New challenges for Human Rights Communications), http://www.huridocs.org/involved/conference/ ... I'll post more on this after I blog the slides. Also good to see this discussion over on the Sunlight Labs list, http://groups.google.com/group/sunlightlabs/browse_thread/thread/e2931af260241ed6/94be63985b224d70?lnk=gstq=rdf#94be63985b224d70 cheers, Dan
Contd: New LOD Cloud - Please send us links to missing data sources
Chris Bizer wrote: Hi Kingsley, You have MySpace and Flickr Wrappers but still don't include all the Virtuoso Sponger Cartridges (which are wrappers) to the Cloud [1] ? The last time I checked the cartridges, I had the impression that they were not very much interlinked with the rest of the LOD cloud and about half of them were down. When was that? Please be specific. The links to DBpedia were rather strange. For instance the first link I found owl:sameAs'ed Yahoo finance balance sheet with Dbpedia bed sheet, which is even for me as a big supporter of owl:sameAs links a bit too much Semantic gap. Even if this anomaly existed, how many minutes would it take to fix that via a constructive feedback loop, really? Did you improve the quality of the external links in the meantime and do the cartridges regularly deliver data? You are being quite subjective here. The measure of quality is what though? Is the Flickr wrapper the quality measure? I am not being bombastic here, I need you to be a little more specific when making public comments. Another problem is that many of the sources are not really Open Data as various license restrictions apply. Examples, assuming we are all in this together. Kingsley Cheers Chris -Ursprüngliche Nachricht- Von: public-lod-requ...@w3.org [mailto:public-lod-requ...@w3.org] Im Auftrag von Kingsley Idehen Gesendet: Samstag, 28. Februar 2009 00:18 An: Anja Jentzsch Cc: public-lod@w3.org Betreff: Re: New LOD Cloud - Please send us links to missing data sources Anja Jentzsch wrote: Hi all, we are currently updating the LOD cloud. Find the draft here: http://www4.wiwiss.fu-berlin.de/bizer/pub/lod-datasets_2009-02-27.png We have already added: 1. the RKBExplorer cloud 2. the Bio2RDF cloud 3. the LODD cloud 4. GeoSpecies 5. LIBRIS Statistics on triple and link count (as well as target sources) are missing for the following sources: - Faviki - RDFohloh - OpenCalais - LIBRIS Did we forget any new data sources or links between data sources? Keep in mind: A data source qualifies for the cloud, if the data is available via dereferencable URIs and if the data source is interlinked with at least one other source (meaning it references URIs within the namespace of the other source). Anja Anja, You have MySpace and Flickr Wrappers but still don't include all the Virtuoso Sponger Cartridges (which are wrappers) to the Cloud [1] ? Also, the LODD data sets page should be linked to: http://esw.w3.org/topic/DataSetRDFDumps, so we can track down the dumps with ease re. the Virtuoso LOD hosting instance. links: 1. http://virtuoso.openlinksw.com/images/sponger-cloud.html -- Regards, Kingsley Idehen Weblog: http://www.openlinksw.com/blog/~kidehen President CEO OpenLink Software Web: http://www.openlinksw.com
Re: New LOD Cloud - Please send us links to missing data sources
Joshua Tauberer wrote: Not related to this thread, but this just in: The LOD cloud was just on a slide presented at http://transparencycamp.org for the future of http://www.recovery.gov, the website for tracking spending in the U.S.'s economic recovery package. Very thrilling to see it being taken seriously by the U.S. government. Josh Joshua, Great! I think eGovt. is going to be a major area that showcases the virtues of Linked Data. I think GovtTrack.us and Watchdog.net remain on the vanguard of Linked Data in the U.S. based eGovt. realm. Hopefully, a Linked Govt Data Cloud -- with your collective endeavors at the core -- will take shape soon :-) -- Regards, Kingsley Idehen Weblog: http://www.openlinksw.com/blog/~kidehen President CEO OpenLink Software Web: http://www.openlinksw.com
Re: New LOD Cloud - Please send us links to missing data sources
Hi, Anja -- On Feb 27, 2009, at 05:58 PM, Anja Jentzsch wrote: we are currently updating the LOD cloud. Find the draft here: http://www4.wiwiss.fu-berlin.de/bizer/pub/lod-datasets_2009-02-27.png It remains very pretty -- but it feels like a data silo of its own. I can't speak for anyone else, but I find it difficult to read this cloud -- I cannot see which data sets do well at out-linking, nor which sets are apparently good for being out-linked *to*. Where is the data behind the graph? What are the triple counts for each set? What are counts for each arrow? (When the arrow is bidirectional, I would expect 2 counts, 1 for each arrowhead.) In October, when I asked about these, such numbers weren't used in drawing the cloud -- so the sizes of the nodes and the weights of the arcs are just artistic, and/or based on gut feel. This use of commonly understood graphing techniques (larger nodes for larger data sets, thicker arcs for more links between) without any actual data behind it troubles me. Because of this, and because I wanted to easily see which data sets made many links out, and which data sets were linked *to* a lot, I made an alternative graphic -- which doesn't look so pretty (it's much less suggestive of an actual cloud), but which I think is rather more readable, and has no potential misinterpretation about data set sizes or inter-link intensity, as all nodes are the same size and all arcs are the same weight. http://virtuoso.openlinksw.com/images/dbpedia-lod-cloud.html This version makes plain that there are some clusters within the cloud -- and that DBpedia, MusicBrainz, and GeoNames are clearly nexuses for these clusters, being the targets of many inter-links. The new edition reveals several new nexuses, in ECS Southampton, GeneID, UniProt, DBLP RKB Explorer, CiteSeer, and others. At first glance, FOAF appears to be such a nexus, but it is an odd case. On Feb 27, 2009, at 05:58 PM, Anja Jentzsch wrote: Keep in mind: A data source qualifies for the cloud, if the data is available via dereferencable URIs and if the data source is interlinked with at least one other source (meaning it references URIs within the namespace of the other source). I don't think FOAF properly belongs on a cloud of *data sources*, because it's more of a vocabulary than a data-set -- more analogous to Dublic Core than to the others here. In other words, it's more *data dictionary* than *instance data*. There is no FOAF SPARQL endpoint, no FOAF RDF dump, etc., in marked contrast to the others on this graphic. The FOAF ontology is used by *many* data sets which aren't represented here -- which is why I used a cloud for FOAF (and for SIOC). *Most* uses of FOAF are one-off pages, and I don't think those can really be considered data sources never mind data sets for purposes of this diagram. My intent (as time permits) is to build separate illustrations of the data sets that make use of these vocabularies (e.g., LiveJournal, Facebook, Tribe [assuming revival], etc.). Obviously, there are many more data set inter-links in the updated cloud than the previous edition, so there will be more intersections in mine, too. But if you compare mine to the edition it was based on, you'll see that there's a lot less inter-linking in reality than a casual glance at this original suggests -- http://www4.wiwiss.fu-berlin.de/bizer/pub/lod-datasets_2008-09-18_blank.png I think exposing where the gaps are is *much* more likely to lead to them being closed, than making them invisible. I'd be happy to update mine -- and happier still to make the node sizes and arc weights proportional to the data -- but I can no longer reverse engineer the connections simply by looking at the cloud image. Can we get the raw data, please? Be seeing you, Ted -- A: Yes. http://www.guckes.net/faq/attribution.html | Q: Are you sure? | | A: Because it reverses the logical flow of conversation. | | | Q: Why is top posting frowned upon? Ted Thibodeau, Jr. // voice +1-781-273-0900 x32 Evangelism Support //mailto:tthibod...@openlinksw.com OpenLink Software, Inc. // http://www.openlinksw.com/ http://www.openlinksw.com/weblogs/uda/ OpenLink Blogs http://www.openlinksw.com/weblogs/virtuoso/ http://www.openlinksw.com/blog/~kidehen/ Universal Data Access and Virtual Database Technology Providers
Re: New LOD Cloud - Please send us links to missing data sources
Hi all! FYI, the slides that Josua was talking about are here: http://george.thomas.name/omb/ Here is a blog post about how government agencies need to report their spendings in RSS. (http://www.aaronsw.com/weblog/rssstimulus) The data is structured! There will be a OpenGov Ignite during SXSW in Austin and I will be on a panel for Linked Data. Interesting things are coming up around eGov! Juan Sequeda, Ph.D Student Dept. of Computer Sciences The University of Texas at Austin www.juansequeda.com www.semanticwebaustin.org 2009/2/28 Kingsley Idehen kide...@openlinksw.com Joshua Tauberer wrote: Not related to this thread, but this just in: The LOD cloud was just on a slide presented at http://transparencycamp.org for the future of http://www.recovery.gov, the website for tracking spending in the U.S.'s economic recovery package. Very thrilling to see it being taken seriously by the U.S. government. Josh Joshua, Great! I think eGovt. is going to be a major area that showcases the virtues of Linked Data. I think GovtTrack.us and Watchdog.net remain on the vanguard of Linked Data in the U.S. based eGovt. realm. Hopefully, a Linked Govt Data Cloud -- with your collective endeavors at the core -- will take shape soon :-) -- Regards, Kingsley Idehen Weblog: http://www.openlinksw.com/blog/~kidehenhttp://www.openlinksw.com/blog/%7Ekidehen President CEO OpenLink Software Web: http://www.openlinksw.com
Re: New LOD Cloud - Please send us links to missing data sources
Ted Thibodeau Jr wrote: Hi, Anja -- On Feb 27, 2009, at 05:58 PM, Anja Jentzsch wrote: we are currently updating the LOD cloud. Find the draft here: http://www4.wiwiss.fu-berlin.de/bizer/pub/lod-datasets_2009-02-27.png It remains very pretty -- but it feels like a data silo of its own. I can't speak for anyone else, but I find it difficult to read this cloud -- I cannot see which data sets do well at out-linking, nor which sets are apparently good for being out-linked *to*. Where is the data behind the graph? What are the triple counts for each set? What are counts for each arrow? (When the arrow is bidirectional, I would expect 2 counts, 1 for each arrowhead.) In October, when I asked about these, such numbers weren't used in drawing the cloud -- so the sizes of the nodes and the weights of the arcs are just artistic, and/or based on gut feel. This use of commonly understood graphing techniques (larger nodes for larger data sets, thicker arcs for more links between) without any actual data behind it troubles me. Because of this, and because I wanted to easily see which data sets made many links out, and which data sets were linked *to* a lot, I made an alternative graphic -- which doesn't look so pretty (it's much less suggestive of an actual cloud), but which I think is rather more readable, and has no potential misinterpretation about data set sizes or inter-link intensity, as all nodes are the same size and all arcs are the same weight. http://virtuoso.openlinksw.com/images/dbpedia-lod-cloud.html This version makes plain that there are some clusters within the cloud -- and that DBpedia, MusicBrainz, and GeoNames are clearly nexuses for these clusters, being the targets of many inter-links. The new edition reveals several new nexuses, in ECS Southampton, GeneID, UniProt, DBLP RKB Explorer, CiteSeer, and others. At first glance, FOAF appears to be such a nexus, but it is an odd case. On Feb 27, 2009, at 05:58 PM, Anja Jentzsch wrote: Keep in mind: A data source qualifies for the cloud, if the data is available via dereferencable URIs and if the data source is interlinked with at least one other source (meaning it references URIs within the namespace of the other source). Ted, I don't think FOAF properly belongs on a cloud of *data sources*, because it's more of a vocabulary than a data-set -- more analogous to Dublic Core than to the others here. In other words, it's more *data dictionary* than *instance data*. There is no FOAF SPARQL endpoint, no FOAF RDF dump, etc., in marked contrast to the others on this graphic. The FOAF ontology is used by *many* data sets which aren't represented here -- which is why I used a cloud for FOAF (and for SIOC). *Most* uses of FOAF are one-off pages, and I don't think those can really be considered data sources never mind data sets for purposes of this diagram. This would be much clearer if they simply indicated that is implied a FOAF Profile cluster or Data Space as per: http://esw.w3.org/topic/FoafSites . The same thing applies to SIOC. My intent (as time permits) is to build separate illustrations of the data sets that make use of these vocabularies (e.g., LiveJournal, Facebook, Tribe [assuming revival], etc.). The Dictionary/Vocabulary/Schema (TBox) side is fine, which is basically what drove the creation of the UMBEL cloud. Now the LOD cloud and the UMBEL clouds actually come together via the Sponger Cloud since it uses terms from the dictionaries in the UMBEL Cloud and links where appropriate to instance data in the LOD cloud. Examples: 1. Crunchbase - maps on the fly to DBpedia (always has) 2. Wikipedia - which does the DBpedia extraction on the fly, against Wikipedia source data when it determines a deltas between Wikipedia and DBpedia 3. XBRL - both Joshua's stuff and WikiCompany are looked up (*note, this cartridge needs fixing and enhancing, but its still a zillion times better than zilch*) Obviously, there are many more data set inter-links in the updated cloud than the previous edition, so there will be more intersections in mine, too. But if you compare mine to the edition it was based on, you'll see that there's a lot less inter-linking in reality than a casual glance at this original suggests -- http://www4.wiwiss.fu-berlin.de/bizer/pub/lod-datasets_2008-09-18_blank.png The LOD cloud is more about marketing collateral for presentations. Don't take it that seriously in a pure linkage sense. I am only commenting because of the marketing aspects of this diagram. I think exposing where the gaps are is *much* more likely to lead to them being closed, than making them invisible. I'd be happy to update mine -- and happier still to make the node sizes and arc weights proportional to the data -- but I can no longer reverse engineer the connections simply by looking at the cloud image. Can we get the raw data, please? Be seeing you, Ted -- Regards, Kingsley Idehen Weblog:
Re: New LOD Cloud - Please send us links to missing data sources
Juan Sequeda wrote: Hi all! FYI, the slides that Josua was talking about are here: http://george.thomas.name/omb/ Here is a blog post about how government agencies need to report their spendings in RSS. (http://www.aaronsw.com/weblog/rssstimulus) The data is structured! There will be a OpenGov Ignite during SXSW in Austin and I will be on a panel for Linked Data. Interesting things are coming up around eGov! Juan, Thanks! Great material indeed. I've been trying to locate the actual presentation material since the initial posts on Twitter etc.. Kingsley Juan Sequeda, Ph.D Student Dept. of Computer Sciences The University of Texas at Austin www.juansequeda.com http://www.juansequeda.com www.semanticwebaustin.org http://www.semanticwebaustin.org 2009/2/28 Kingsley Idehen kide...@openlinksw.com mailto:kide...@openlinksw.com Joshua Tauberer wrote: Not related to this thread, but this just in: The LOD cloud was just on a slide presented at http://transparencycamp.org for the future of http://www.recovery.gov, the website for tracking spending in the U.S.'s economic recovery package. Very thrilling to see it being taken seriously by the U.S. government. Josh Joshua, Great! I think eGovt. is going to be a major area that showcases the virtues of Linked Data. I think GovtTrack.us and Watchdog.net remain on the vanguard of Linked Data in the U.S. based eGovt. realm. Hopefully, a Linked Govt Data Cloud -- with your collective endeavors at the core -- will take shape soon :-) -- Regards, Kingsley Idehen Weblog: http://www.openlinksw.com/blog/~kidehen http://www.openlinksw.com/blog/%7Ekidehen President CEO OpenLink Software Web: http://www.openlinksw.com -- Regards, Kingsley Idehen Weblog: http://www.openlinksw.com/blog/~kidehen President CEO OpenLink Software Web: http://www.openlinksw.com
Re: New LOD Cloud - Please send us links to missing data sources
Hey Ted, Ted Thibodeau Jr schrieb: Hi, Anja -- On Feb 27, 2009, at 05:58 PM, Anja Jentzsch wrote: we are currently updating the LOD cloud. Find the draft here: http://www4.wiwiss.fu-berlin.de/bizer/pub/lod-datasets_2009-02-27.png It remains very pretty -- but it feels like a data silo of its own. I can't speak for anyone else, but I find it difficult to read this cloud -- I cannot see which data sets do well at out-linking, nor which sets are apparently good for being out-linked *to*. Where is the data behind the graph? What are the triple counts for each set? Most of that data is taken from the ESW wiki page http://esw.w3.org/topic/TaskForces/CommunityProjects/LinkingOpenData/DataSets or the corresponding data set pages / endpoints. What are counts for each arrow? (When the arrow is bidirectional, I would expect 2 counts, 1 for each arrowhead.) The link counts where also taken from the data set pages and in unclear cases I did verify link counts (and Richard did before). If there are bidirectional links they count as one. In October, when I asked about these, such numbers weren't used in drawing the cloud -- so the sizes of the nodes and the weights of the arcs are just artistic, and/or based on gut feel. This use of commonly understood graphing techniques (larger nodes for larger data sets, thicker arcs for more links between) without any actual data behind it troubles me. There are some very clear rules for edge and node sizes. Concerning the edges there are three sizes: - thin for some 100 links - middle for some 1000 up to 10.000 links - thick for 100.000 and more The nodes are divided into five sizes: - 10K triples - 10K+ triples - 500K+ triples - 10M+ triples - 1B+ triples Because of this, and because I wanted to easily see which data sets made many links out, and which data sets were linked *to* a lot, I made an alternative graphic -- which doesn't look so pretty (it's much less suggestive of an actual cloud), but which I think is rather more readable, and has no potential misinterpretation about data set sizes or inter-link intensity, as all nodes are the same size and all arcs are the same weight. http://virtuoso.openlinksw.com/images/dbpedia-lod-cloud.html Sure, different views on the cloud are useful. Clustering by subject might be another one. The provided cloud on the one hand shows the growth oft the cloud and tries to cluster it on the other. This version makes plain that there are some clusters within the cloud -- and that DBpedia, MusicBrainz, and GeoNames are clearly nexuses for these clusters, being the targets of many inter-links. The new edition reveals several new nexuses, in ECS Southampton, GeneID, UniProt, DBLP RKB Explorer, CiteSeer, and others. At first glance, FOAF appears to be such a nexus, but it is an odd case. On Feb 27, 2009, at 05:58 PM, Anja Jentzsch wrote: Keep in mind: A data source qualifies for the cloud, if the data is available via dereferencable URIs and if the data source is interlinked with at least one other source (meaning it references URIs within the namespace of the other source). I don't think FOAF properly belongs on a cloud of *data sources*, because it's more of a vocabulary than a data-set -- more analogous to Dublic Core than to the others here. In other words, it's more *data dictionary* than *instance data*. There is no FOAF SPARQL endpoint, no FOAF RDF dump, etc., in marked contrast to the others on this graphic. The FOAF ontology is used by *many* data sets which aren't represented here -- which is why I used a cloud for FOAF (and for SIOC). *Most* uses of FOAF are one-off pages, and I don't think those can really be considered data sources never mind data sets for purposes of this diagram. My intent (as time permits) is to build separate illustrations of the data sets that make use of these vocabularies (e.g., LiveJournal, Facebook, Tribe [assuming revival], etc.). Obviously, there are many more data set inter-links in the updated cloud than the previous edition, so there will be more intersections in mine, too. But if you compare mine to the edition it was based on, you'll see that there's a lot less inter-linking in reality than a casual glance at this original suggests -- http://www4.wiwiss.fu-berlin.de/bizer/pub/lod-datasets_2008-09-18_blank.png I think exposing where the gaps are is *much* more likely to lead to them being closed, than making them invisible. I'd be happy to update mine -- and happier still to make the node sizes and arc weights proportional to the data -- but I can no longer reverse engineer the connections simply by looking at the cloud image. Can we get the raw data, please? I will provide SVG and other versions on the ESW wiki page when the cloud is final. Cheers Anja Be seeing you, Ted
Re: New LOD Cloud - Please send us links to missing data sources
congrats and kudos to all those who've made this happen. I think the cloud diagrams are proving a very compelling visual for people who don't care about nerdy detail but understand the idea of interlinked datasets. Yes they're great for handwaving if the audience has never seen it, otherwise its likely counterproductive The problem is that LOD has been stuck here 2 years really now, not a single advance not a single application (of the LOD model, not of the data, the data is obviously useful and expressing in RDF is also starting to be seen as useful) . That the bubbles continue to grown is however a sociological interesting phenomen :-) On the positive side, i recently reviewed some work by someone who has a very interesting way to create a diagram which actually helps by showing which queries can be asked. Too bad you wont see it in action at ESWC because the demo paper was not up to the springer standards for legibility, according to some other reviewer. Giovanni
Re: New LOD Cloud - Please send us links to missing data sources
On 1/3/09 01:30, Giovanni Tummarello wrote: congrats and kudos to all those who've made this happen. I think the cloud diagrams are proving a very compelling visual for people who don't care about nerdy detail but understand the idea of interlinked datasets. Yes they're great for handwaving if the audience has never seen it, otherwise its likely counterproductive The problem is that LOD has been stuck here 2 years really now, not a single advance not a single application (of the LOD model, not of the data, the data is obviously useful and expressing in RDF is also starting to be seen as useful) . Well, it *is* all about the data. Don't forget that! If the cloud diagrams only serve to remind people that many many datasets overlap in scope, and can be aggregated into larger units wherever they mention common objects and use common vocabulary, all is well. We don't need intelligent mobile agents for this to pay off. Just nice big databases and good old fashioned code. LOD is an elaboration and improvement on the original linking model we had in FOAF (back before RDFCore when the RDF spec was vague on some key points, like how many URIs a thing could have, how to model same-thing-ness, ...). The main reason for rdfweb (as I called it originally) was discovery. In 2000, there was basically no RDF in the public Web, apart from some half-hearted bits of Dublin Core. No search engines did anything with it then (vs today, with Yahoo, Google, Yandex, Nutch, Sindice, SWSE et al.). So having an information linking model for RDF was important: it meant we could pretty much find all the RDF in the public Web by starting at one FOAF file and crawling. I think LOD has similar value today, but the pressure to have a hypertext-based discovery model is somewhat reduced. Partly because dataset-level information is available (eg. URL templates for LiveJournal, or VOID for LOD sites), and these tell coders how they can get their hands on huge chunks of data. But also because there are more aggregators and lookup tools. Even if most apps work only with a single dataset, linking is worthwhile. It reduces the degree of coupling between app and dataset, by increasing the commonalities between datasets. And it's a nice hook for crawlers, who can then expose different aggregate views back as more bubbles. That the bubbles continue to grown is however a sociological interesting phenomen :-) Nothing wrong with sociology! :) I think as SKOS gets rolled out more seriously, linkage by topic (eg. LCSH, Dbpedia, ...) will become worth its own custom visualisation... On the positive side, i recently reviewed some work by someone who has a very interesting way to create a diagram which actually helps by showing which queries can be asked. Too bad you wont see it in action at ESWC because the demo paper was not up to the springer standards for legibility, according to some other reviewer. The problem here imho is that too many people have forgotten that it is the Semantic Web project, and instead treat Semantic Web as the name for a research field, or for a hypothetical future version of the Web that may never exist. cheers, Dan
New LOD Cloud - Please send us links to missing data sources
Hi all, we are currently updating the LOD cloud. Find the draft here: http://www4.wiwiss.fu-berlin.de/bizer/pub/lod-datasets_2009-02-27.png We have already added: 1. the RKBExplorer cloud 2. the Bio2RDF cloud 3. the LODD cloud 4. GeoSpecies 5. LIBRIS Statistics on triple and link count (as well as target sources) are missing for the following sources: - Faviki - RDFohloh - OpenCalais - LIBRIS Did we forget any new data sources or links between data sources? Keep in mind: A data source qualifies for the cloud, if the data is available via dereferencable URIs and if the data source is interlinked with at least one other source (meaning it references URIs within the namespace of the other source). Anja
Re: New LOD Cloud - Please send us links to missing data sources
Anja Jentzsch wrote: Hi all, we are currently updating the LOD cloud. Find the draft here: http://www4.wiwiss.fu-berlin.de/bizer/pub/lod-datasets_2009-02-27.png We have already added: 1. the RKBExplorer cloud 2. the Bio2RDF cloud 3. the LODD cloud 4. GeoSpecies 5. LIBRIS Statistics on triple and link count (as well as target sources) are missing for the following sources: - Faviki - RDFohloh - OpenCalais - LIBRIS Did we forget any new data sources or links between data sources? Keep in mind: A data source qualifies for the cloud, if the data is available via dereferencable URIs and if the data source is interlinked with at least one other source (meaning it references URIs within the namespace of the other source). Anja Anja, You have MySpace and Flickr Wrappers but still don't include all the Virtuoso Sponger Cartridges (which are wrappers) to the Cloud [1] ? Also, the LODD data sets page should be linked to: http://esw.w3.org/topic/DataSetRDFDumps, so we can track down the dumps with ease re. the Virtuoso LOD hosting instance. links: 1. http://virtuoso.openlinksw.com/images/sponger-cloud.html -- Regards, Kingsley Idehen Weblog: http://www.openlinksw.com/blog/~kidehen President CEO OpenLink Software Web: http://www.openlinksw.com
Re: New LOD Cloud - Please send us links to missing data sources
On 19 Sep 2008, at 13:07, [EMAIL PROTECTED] wrote: but by that token you could probably wipe out most of foaf and doap space from the diagram Most of that data is not very linky and many primary resources being described don't have uris Sure, I am guessing you are talking about foaf:knowing b-nodes, but the use of a rdfs:seeAlso with a IFP, should satisfy the notion of being linky, or am I wrong in thinking this? Cheers, Mischa On 9/19/08, Tom Heath [EMAIL PROTECTED] wrote: Hey Mischa, Good to hear you :) Just to add to what Peter said, last time I checked LiveJournal was not very Linked Data-friendly, which is a shame, naturally, as they were well ahead of the curve with the FOAF export. Cheers, Tom. 2008/9/19 Peter Ansell [EMAIL PROTECTED]: - [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: From: [EMAIL PROTECTED] [EMAIL PROTECTED] To: public-lod@w3.org Sent: Friday, September 19, 2008 1:55:07 AM GMT +10:00 Brisbane Subject: Re: New LOD Cloud - Please send us links to missing data sources Hello, There doesnt seem to be any mention of the LiveJournal or any of the livejournal powered blogging sites, such as: vox, friendfeed, hi5 to name a few. I think they are implicitly in the FOAF cloud, for want of a better description of that node ;) Cheers, Peter Find out more about Talis at www.talis.com Shared InnovationTM Any views or personal opinions expressed within this email may not be those of Talis Information Ltd. The content of this email message and any files that may be attached are confidential, and for the usage of the intended recipient only. If you are not the intended recipient, then please return this message to the sender and delete it. Any use of this e-mail by an unauthorised recipient is prohibited. Talis Information Ltd is a member of the Talis Group of companies and is registered in England No 3638278 with its registered office at Knights Court, Solihull Parkway, Birmingham Business Park, B37 7YB. __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __ ___ Mischa Tuffield Email: [EMAIL PROTECTED] Homepage - http://users.ecs.soton.ac.uk/mmt04r/ FOAF - http://users.ecs.soton.ac.uk/mmt04r/foaf.rdf
Re: New LOD Cloud - Please send us links to missing data sources
I wonder if we could highlight those doing a great job in this space more, e.g. I believe Opera's foaf output is LOD On Fri, Sep 19, 2008 at 1:45 PM, Tom Heath [EMAIL PROTECTED] wrote: Sad but true. Things are improving in my experience but we still have some evangelism to do in this area. On 19/09/2008, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: but by that token you could probably wipe out most of foaf and doap space from the diagram Most of that data is not very linky and many primary resources being described don't have uris On 9/19/08, Tom Heath [EMAIL PROTECTED] wrote: Hey Mischa, Good to hear you :) Just to add to what Peter said, last time I checked LiveJournal was not very Linked Data-friendly, which is a shame, naturally, as they were well ahead of the curve with the FOAF export. Cheers, Tom. 2008/9/19 Peter Ansell [EMAIL PROTECTED]: - [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: From: [EMAIL PROTECTED] [EMAIL PROTECTED] To: public-lod@w3.org Sent: Friday, September 19, 2008 1:55:07 AM GMT +10:00 Brisbane Subject: Re: New LOD Cloud - Please send us links to missing data sources Hello, There doesnt seem to be any mention of the LiveJournal or any of the livejournal powered blogging sites, such as: vox, friendfeed, hi5 to name a few. I think they are implicitly in the FOAF cloud, for want of a better description of that node ;) Cheers, Peter Find out more about Talis at www.talis.com Shared InnovationTM Any views or personal opinions expressed within this email may not be those of Talis Information Ltd. The content of this email message and any files that may be attached are confidential, and for the usage of the intended recipient only. If you are not the intended recipient, then please return this message to the sender and delete it. Any use of this e-mail by an unauthorised recipient is prohibited. Talis Information Ltd is a member of the Talis Group of companies and is registered in England No 3638278 with its registered office at Knights Court, Solihull Parkway, Birmingham Business Park, B37 7YB. __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __ Find out more about Talis at www.talis.com Shared InnovationTM Any views or personal opinions expressed within this email may not be those of Talis Information Ltd. The content of this email message and any files that may be attached are confidential, and for the usage of the intended recipient only. If you are not the intended recipient, then please return this message to the sender and delete it. Any use of this e-mail by an unauthorised recipient is prohibited. Talis Information Ltd is a member of the Talis Group of companies and is registered in England No 3638278 with its registered office at Knights Court, Solihull Parkway, Birmingham Business Park, B37 7YB. __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __
Re: New LOD Cloud - Please send us links to missing data sources
Hello, There doesnt seem to be any mention of the LiveJournal or any of the livejournal powered blogging sites, such as: vox, friendfeed, hi5 to name a few. And you are missing links from QDOS to dbpedia :) Cheers, Mischa On 17 Sep 2008, at 15:14, Anja Jentzsch wrote: Hi all, thanks for all the input. Find the updated LOD cloud attached. We added: 6. Surge Radio 7. MySpace Wrapper 8. BBC Programmes 9. BBC Placount Data and several new connections between the datasets We are still in contact with Kingsley on adding the mentioned wrappers to the cloud. Anything still missing? Anja Chris Bizer schrieb: Hi all, Anja and I are currently updating the LOD cloud for the ESW wikipage. Draft attached. Up till now we have added: 1.CrunchBase 2. LinkedMDB 3. YAGO 4. UMBEL 5. the PubGuide It nice to see that fitting everything into one diagram is getting increasingly difficult as the cloud grows :-) Did we forget any new data sources or links between data sources? As discussed before: A data source qualifies for the cloud, if the data is available via dereferencable URIs and if the data source is interlinked with at least one other source (meaning it references URIs within the namespace of the other source). Any feedback highly welcome. Cheers Chris -- Prof. Dr. Chris Bizer Freie Universität Berlin Phone: +49 30 838 55509 Mail: [EMAIL PROTECTED] Web: www.bizer.de lod-datasets_2008-09-17.png ___ Mischa Tuffield Email: [EMAIL PROTECTED] Homepage - http://users.ecs.soton.ac.uk/mmt04r/ FOAF - http://users.ecs.soton.ac.uk/mmt04r/foaf.rdf
Re: New LOD Cloud - Please send us links to missing data sources
Can I echo Tom's Looking forward to the new diagram. If it was available before Friday that would be great, as I'll be giving a talk and would love to show the enlarged cloud ;) ??? I don't need it till Monday, though... ;-) Paul -- Paul Miller Technology Evangelist, Talis w: www.talis.com/ skype: napm1971 mobile/cell: +44 7769 740083 http://blogs.zdnet.com/semantic-web/ www.linkedin.com/in/pau1mi11er On 17 Sep 2008, at 13:05, Tom Heath wrote: Hi Chris, A couple of additions/questions: - The links between Revyu and the SW Conference Corpus are two-way - Should Ontoworld be renamed SemanticWeb.org? - Revyu and SemanticWeb.org have two-way links - Is the BBC stuff going to be added? Looking forward to the new diagram. If it was available before Friday that would be great, as I'll be giving a talk and would love to show the enlarged cloud ;) Cheers, Tom. 2008/9/16 Chris Bizer [EMAIL PROTECTED]: Hi all, Anja and I are currently updating the LOD cloud for the ESW wikipage. Draft attached. Up till now we have added: 1.CrunchBase 2. LinkedMDB 3. YAGO 4. UMBEL 5. the PubGuide It nice to see that fitting everything into one diagram is getting increasingly difficult as the cloud grows :-) Did we forget any new data sources or links between data sources? As discussed before: A data source qualifies for the cloud, if the data is available via dereferencable URIs and if the data source is interlinked with at least one other source (meaning it references URIs within the namespace of the other source). Any feedback highly welcome. Cheers Chris -- Prof. Dr. Chris Bizer Freie Universität Berlin Phone: +49 30 838 55509 Mail: [EMAIL PROTECTED] Web: www.bizer.de Find out more about Talis at www.talis.com Shared InnovationTM Any views or personal opinions expressed within this email may not be those of Talis Information Ltd. The content of this email message and any files that may be attached are confidential, and for the usage of the intended recipient only. If you are not the intended recipient, then please return this message to the sender and delete it. Any use of this e-mail by an unauthorised recipient is prohibited. Talis Information Ltd is a member of the Talis Group of companies and is registered in England No 3638278 with its registered office at Knights Court, Solihull Parkway, Birmingham Business Park, B37 7YB. __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __
