A I M S
Linked Open (meta)Data
Yves JaquesOEKCS
FAO of the United Nations
Who cares?
“All kinds of conceptual things,they have names now that start with HTTP*”
2
Tim Berners-Lee
*(50 billion currently indexed by Google)
24 November2011 KISAF: Linked Open Data
Really, why bother?
“I get important information back…some in a standard format…data that somebody
might like to know about that thing”
3
Tim Berners-Lee
24 November2011 KISAF: Linked Open Data
I mean really, why bother?
“And when [that info] has relationships, then the other thing that it's related to is given one of those names that starts with HTTP”
4
Tim Berners-Lee
24 November2011 KISAF: Linked Open Data
Okay, everything is connected…
24 November2011 5
http://
http://
<a href=“http:// <a href=“http://
http://
<a href=“http://
http://
<a href=“http://
KISAF: Linked Open Data
But…
Web pages are just a mess of formatting
The data gets lost
Difficult to teach machines to reliably get meaning out of web pages
624 November2011 KISAF: Linked Open Data
Enter Linked Data…
Outlined four principles of Linked Data in his Design Issues:
Use URIs to identify thingsUse HTTP URIs so that these things can be referred to and looked up (dereferenced) by people and user agentsProvide useful information about the thing when its URI is dereferenced, using standard formats such as RDF/XMLInclude links to other, related URIs in the exposed data to improve discovery of other related information on the Web
7
Tim Berners-Lee
24 November2011 KISAF: Linked Open Data
What might it look like?
824 November2011 KISAF: Linked Open Data
Under the hoodSKOS (Simple Knowledge Organization System)
skos:ConceptSchemeskos:concept
skos:prefLabelskos:altLabel skos:definitionskos:broaderskos:narrowerskos:relatedskos:closeMatchskos:exactMatch
924 November2011 KISAF: Linked Open Data
AGROVOC model
10
Nodes and arcs / vertices and edges
24 November2011 KISAF: Linked Open Data
The Linked Data cloud
1124 November2011 KISAF: Linked Open Data
So what?
1224 November2011 KISAF: Linked Open Data
Break down
the silos!
Parting thought…
KISAF: Linked Open Data 1324 November2011
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