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Interlinking Multimedia: How to Apply Linked Data Principles to Multimedia Fragments Michael Hausenblas, < [email_address] >, Raphaël Troncy , < [email_address] >, Tobias Bürger, < [email_address] >, Yves Raimond, < [email_address] >

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Where is the Triumph Arc? http://www.flickr.com/photos/40001315@N00/2705120551 /

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Who is Saphira? http://www.flickr.com/photos/mhausenblas/2883727293/ <ul><li>Region-based annotation in Flickr ... but it cannot be taken out of Flickr </li></ul><ul><ul><li>the flickr note provides a URI for the region, but one needs to access the flickr API to access the region [ CaMiCatzee ] </li></ul></ul>

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Clinton Laughing with Yeltsin? http://www.youtube.com/watch?v=sxoh1z6s_Cw#t=15s <ul><li>Temporal annotation in YouTube ... but the UA downloads the complete resource and seeks ... and the YouTube syntax is different from Google Video, Vimeo, DailyMotion, etc. </li></ul>

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Problems <ul><li>How to address and retrieve parts of multimedia content? </li></ul><ul><ul><li>region of an image / sequence of a video </li></ul></ul><ul><li>How to describe parts of multimedia content in the Web of Data? </li></ul>PREFIX foaf: <http://xmlns.com/foaf/0.1/> SELECT ?Clip WHERE { ?Clip foaf:depicts dbpedia:Laughter , yago:PresidentsOfTheRussianFederation , yago:President110468559 . }

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Answer abstract queries <ul><li>Find all sequences with a Russian President laughing with another President </li></ul>dbpedia:Boris_Yeltsin rdf:type yago:PresidentsOfTheRussianFederation dbpedia:Vladimir_Putin rdf:type yago:PresidentsOfTheRussianFederation #t=34s #t=15s

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iM: Interlinking Multimedia <ul><li>Apply linked data principles for fine-grained identification and description of multimedia fragments [ W3C Media Fragments WG ] </li></ul><ul><li>Deploy legacy multimedia metadata formats on the web of data [ ramm.x ] </li></ul><ul><li>Specialized interlinking methods for multimedia </li></ul><ul><ul><li>User-contributed interlinking, game-based </li></ul></ul><ul><ul><li>Collaborative interlinking: MetaVidWiki [ MVW ] </li></ul></ul><ul><ul><li>(Semi-)Automatic methods: multimedia analysis </li></ul></ul>

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W3C Media Fragments WG <ul><li>Provide URI-based mechanisms for uniquely identifying fragments for media objects on the Web, such as video, audio, and images. </li></ul>

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Scenario 1: retrieve the media content <ul><li>User Agent (media fragment conforming) : http:// www.youtube.com/watch?v =sxoh1z6s_Cw#12,21 </li></ul><ul><ul><li>GET / watch?v =sxoh1z6s_Cw HTTP/1.1 Host: www.youtube.com Accept: video/* Range: seconds=12-21 [ HTTPBis clarification ] </li></ul></ul><ul><li>Server: </li></ul>

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Scenario 2: retrieve a semantic representation of the media content <ul><li>User Agent: </li></ul><ul><ul><li>GET / watch?v =sxoh1z6s_Cw HTTP/1.1 Host: www.youtube.com Accept: application/rdf+xml Range: seconds=12-21 </li></ul></ul><ul><li>Server: </li></ul>

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Discussion <ul><li>Is conneg-ing between rdf+xml and video/* a good behavior? </li></ul><ul><ul><li>Current configuration of jigsaw [ W3C Photo RDF ] </li></ul></ul><ul><ul><li>Equivalent: « Content is &quot;equivalent&quot; to other content when both fulfill essentially the same function or purpose upon presentation to the user » [ WAG ] </li></ul></ul><ul><ul><li>Abuse of content negotiation: what is the sameness of two representations of a resource? </li></ul></ul><ul><li>How to draw the line? </li></ul><ul><ul><li>Are an image and its ASCII version close enough to be content negotiated? </li></ul></ul><ul><ul><li>Is a transcoded media content still a fragment? </li></ul></ul>

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More Resources <ul><li>Use Cases and Requirements for Media Fragments http://www.w3.org/TR/media-frags-reqs </li></ul><ul><li>Interlinking Multimedia http://www.interlinkingmultimedia.info/ </li></ul><ul><li>Continue the discussion @ LOD http://lists.w3.org/Archives/Public/public-lod/ </li></ul>