Semantic Web

Semantic Web Architecture and Technology António Cruz, Software Architect

Agenda ,[object Object],[object Object],[object Object]

Vision ,[object Object],[object Object]

What is Semantics? ,[object Object]

What is the Semantic Web? ,[object Object],[object Object],[object Object]

What is an Ontology? ,[object Object]

“ Anyone can say anything about anything” ,[object Object],[object Object]

Why use RDF? ,[object Object],[object Object],[object Object]

Top-Down & Bottom-Up ,[object Object],[object Object]

Pros & Cons ,[object Object],[object Object],[object Object]

Semantic Web vs. semantic web S emantic W eb s emantic w eb Philosophy Build common data format for expressing the meaning of data. Use ontologies to help machines to understand web content. Humans first, machines second. Encode existing Web content with special tags. Language RDF, RDFS, OWL Based on XHTML tags: micro-formats Format Must be well-formed RDF documents Anything goes, as long as its XHTML Semantic Defined by the underlying ontology model (e.g., OWL) Loosely defined. No formal semantic model. Examples FOAF, OWL-S, OWL-Time XFN (social network), hCard (contact), hReview (opinions), rel-tag (taggging)

Trust and Proof ,[object Object],[object Object]

The Linking Open Data dataset cloud

(in WSRI - http://webscience.org/)

It’s All About The Context ,[object Object]

The value of Syllogisms ,[object Object]

Metadata ,[object Object],[object Object],[object Object]

A Simple SPARQL Query ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Semantic Web

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