linked open (meta)data

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


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


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


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


What might it look like?


Under the hoodSKOS (Simple Knowledge Organization System)

skos:ConceptSchemeskos:concept

skos:prefLabelskos:altLabel skos:definitionskos:broaderskos:narrowerskos:relatedskos:closeMatchskos:exactMatch


AGROVOC model

10

Nodes and arcs / vertices and edges


The Linked Data cloud


So what?


Break down

the silos!

Parting thought…

KISAF: Linked Open Data 1324 November2011

linked open (meta)data

Education