Semantic Web in Action

Semantic Web in Action Stefan Decker, Eyal Oren, Sebastian R. Kruk

Outline ,[object Object],[object Object],[object Object],[object Object],[object Object]

DERI Galway – Mission ,[object Object],[object Object],[object Object],[object Object],[object Object]

Some statistics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],What is the Semantic Web? (beware the hype)

Social semantic information spaces: SW 2.0 Web 2.0 and social software

SIOC: Semantically Interlinked Community Sites Stefan Decker

What is SIOC? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Browsing SIOC with TimeLine (1)

Browsing SIOC with TimeLine (2)

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],How can SIOC disseminated?

Next steps : Add Onion Rings of Vocabularies RDF Calendar Microformats

Semantic Web application development: ActiveRDF and BrowseRDF Eyal Oren

Semantic Web applications: Database-driven web applications Semantic Web applications Centralised Decentralised One fixed schema Semi-structured One fixed vocabulary Arbitrary vocabulary Centralised publishing Publish anywhere One datasource Many distributed datasources Closed system s Open systems

Motivation relational web applications: database object-relational mapping web application framework

Motivation relational web applications: semantic web applications: database object-relational mapping web application framework

Motivation relational web applications: semantic web applications: database object-relational mapping web application framework data source

Motivation relational web applications: semantic web applications: database object-relational mapping web application framework data source RDF store

Motivation relational web applications: semantic web applications: database object-relational mapping web application framework ??? data source RDF store ???

Motivation relational web applications: semantic web applications: database object-relational mapping web application framework ??? data source RDF store ??? ActiveRDF Ruby on Rails

ActiveRDF: RDF(S) to OO mapping ,[object Object],[object Object],[object Object],[object Object],foaf:Person a rdfs:Class. john a foaf:Person. john foaf:name “John Breslin”. Person name:string john: Person name: “John Breslin”

ActiveRDF examples ,[object Object],[object Object]

ActiveRDF architecture proxy objects represent RDF resource, convert methods into queries abstract query API manages collection of data sources wraps RDF store with its own API

ActiveRDF object manager ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

ActiveRDF adapters ,[object Object],[object Object],[object Object],[object Object],[object Object]

Problems with intuitive mapping ,[object Object],[object Object],[object Object],[object Object],[object Object]

Faceted Navigation for RDF Data

Faceted browsing example: iTunes

Faceted browsing: limitations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Faceted browsing on the Semantic Web ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],SELECT ?x WHERE ?x author ?a and ?a age “30”.

Selection operators all thirty-year-olds all single people all people who know somebody with a friend called Stefan

Intersection operator all single thirty-year-olds that know somebody who has a friend called Stefan

Inverse operators all DERI employees all working people all people working for an Irish company

Interface construction algorithm select resources (constrain information space) select facets (arcs in constrained space) rank facets (identify most interesting facets) select ?s where ... select ?p where ...

Facet browsing: decision tree ,[object Object],...

Facet ranking: optimise decision tree ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SIOC explorer ,[object Object],[object Object],[object Object]

JeromeDL the Semantic Digital Library Sharing and Interconnecting Knowledge Sebastian R. Kruk

Motivation ,[object Object],[object Object]

Yesterday ’s world of digital content ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

To morrow of interconnected , social media ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

JeromeDL - Properties ,[object Object],[object Object],[object Object],[object Object],[object Object]

Metadata and Services in JeromeDL

Semantic Metadata and Services

Browsing the data graph – why? ,[object Object],[object Object],[object Object],[object Object],[object Object]

Browsing the data graph – how? ,[object Object],[object Object],[object Object],[object Object],[object Object]

Browsing the data graph ,[object Object]

Social Semantic Collaborative Filtering ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Social Semantic Collaborative Filtering foaf:knows xfoaf:include xfoaf:bookmark

Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Semantic Web in Action

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