On 9/8/12 4:39 PM, Michael Douma wrote:
Hi Kingsley,I've been on this list a short time, and I've seen several comments from you about the "need" for projects that use dbpedia to do all this interlinking with dbpedia, exposing, and whatnot.Can you please explain more about your thinking?It seems to me that there are many faces to open data. These range from sharing data, to linking data, to using data. While I am an advocate of open data, I'm also an advocate of broad use, and I think it would be great for there to be more public-serving web sites that are a front-end to dbpedia. Students and the general public who are using this structured data certainly should not be forcefed the technical aspects. ... and I don't think you necessarily intend that.Can you explain more about what you consider the ideal front end? Specifically, imagine an end-user-focused web site or mobile app. Are you resistant to pure browsers which never expose any actual links to data?Michael
Michael,There are some very important things that are sometimes a little unclear about Linked Data and DBpedia. I would characterize them as follows:
1. Best Practices 2. Actual Principles. Best Practices:Attribute your Linked Data sources in your Linked Data consumers. You can achieve this in a number of ways, in descending preference order:
1. Make the DBpedia data source URIs visible to user agents that are capable of processing HTTP response headers (using "Link:") and/or <link/> entries in <head/> section of (X)HTML documents -- here you have the ability to point to one or all the URIs referenced in a document, just as one would when attributing sources in a paper
2. Use DBpedia URIs for @href values In (X)HTML document3. Explicitly acknowledge DBpedia as a data source -- this is the least preferred option because its loose and veers way from fundamental Linked Data principles.
Actual Principles:Linked Data is all about creating a virtuous cycle that ultimately increases the density of the burgeoning Web of Linked Data or Data Web. Every producer or consumer is ultimately in a symbiotic as opposed to parasitic relationship. Thus, all Linked Data consumers have to keep the chain of links going by creating resources and interfaces that enable others user agents discover and follow (using the follow-your-nose pattern) Linked Data URIs e.g., those produced by DBpedia and other Data Spaces in the LOD cloud. This is what Linked Data is fundamentally about.
Put differently, its the same principle behind the document Web, when you publish an HTML file, the virtue lies in linking to something else on the Web. That act is the fundamental essence of the Web. Linked Data just adds granularity to this most powerful principle.
Thanks for this post, as what I've outlined is something isn't always expressly clear re. DBpedia or the rest of the LOD cloud. All we seek, fundamentally, is a symbiotic ecosystem that virtuously makes Web denser and ultimately more useful.
Here are examples of what I mean, using DBpedia resources as an example: 1. http://dbpedia.org/resource/DBpedia -- URI that denotes a DBpedia entity2. http://dbpedia.org/page/DBpedia -- URI/URL that denotes a document that describes a DBpedia entity
3. http://bit.ly/OipZA3 -- URI Debugger showcasing the approaches I listed re. making URIs available to other user agents via "Link:" (response headers) and/or <link/> (html doc header section)
4. http://dbpedia.org/describe/?url=http://dbpedia.org/resource/DBpedia -- an alternative URI/URL that denotes a document that describes a DBpedia entity
5. http://bit.ly/OwNOzP -- URI Debugger showcasing approaches listed above re. making URIs available to other user agents .
Thanks for this post, this is an important matter that isn't always clear to others that build Linked Data consumer applications.
Kingsley
Kingsley Idehen wrote:On 9/7/12 2:51 AM, Sebastian Hellmann wrote:Hello Emil,nice, could you register in the Wiki and add your tool under applications:http://wiki.dbpedia.org/ApplicationsI have a concern with this application, and I think we really need to be clear about this as a baseline for others, it takes DBpedia URIs out of scope on the following fronts: 1. Web page -- no use of @href and/or <link/> relationships to exposeDBpedia data source URIs (which also doubles as fine-grained Attribution)2. HTTP responses -- if for whatever reasons #1 isn't possible then "Link:" response headers also do the trick. Linked Data isn't about pretty Web pages, its about human and/or machine accessibility to fine-grained and webby structured data via de-referencable URIs. This aspect of the mission is sacrosanct, and we all have to do a better job of making this clear to those that are new to the project. To keep URIs out of scope is to inadvertently break the Web of Linked Data for which DBpedia remains crucial. KingsleyThanks, Sebastian Am 07.09.2012 01:35, schrieb Emil Müller:Hello DBpedia. I have developed a new interface to DBpedia. Instead of accessing data through SPARQL, it revolves around a new object-oriented programminglanguage that should be familiar to most programmers. Feature-wise it is similar to Python. You can even ask it questions. If anybody is interested, seehttp://alumis.dnsd.info/. I'd love some feedback. Currently runs off anold 32-bit computer with 4 Gb of memory, so please be nice with it :) Database is limited. Emil Muller------------------------------------------------------------------------------Live Security Virtual Conference Exclusive live event will cover all the ways today's security andthreat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malwarethreats.http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Dbpedia-discussion mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion-- Dipl. Inf. Sebastian Hellmann Department of Computer Science, University of Leipzig Events: *http://sabre2012.infai.org/mlode (Leipzig, Sept. 23-24-25, 2012) *http://wole2012.eurecom.fr (*Deadline: July 31st 2012*) Projects:http://nlp2rdf.org ,http://dbpedia.org Homepage:http://bis.informatik.uni-leipzig.de/SebastianHellmann Research Group:http://aksw.org------------------------------------------------------------------------------Live Security Virtual Conference Exclusive live event will cover all the ways today's security andthreat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malwarethreats.http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Dbpedia-discussion mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion-- Regards, Kingsley Idehen Founder& CEO OpenLink Software Company Web:http://www.openlinksw.com Personal Weblog:http://www.openlinksw.com/blog/~kidehen Twitter/Identi.ca handle: @kidehen Google+ Profile:https://plus.google.com/112399767740508618350/about LinkedIn Profile:http://www.linkedin.com/in/kidehen------------------------------------------------------------------------------Live Security Virtual Conference Exclusive live event will cover all the ways today's security andthreat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malwarethreats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Dbpedia-discussion mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion
-- Regards, Kingsley Idehen Founder & CEO OpenLink Software Company Web: http://www.openlinksw.com Personal Weblog: http://www.openlinksw.com/blog/~kidehen Twitter/Identi.ca handle: @kidehen Google+ Profile: https://plus.google.com/112399767740508618350/about LinkedIn Profile: http://www.linkedin.com/in/kidehen
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