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A First Course in RDF and RDFS (Resource Description Framework and Resource Description Framework Schema)
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This tutorial was given at SemTech 2008, on May 19th. From the program: "RDF is a key W3C specification and a foundational component of the Semantic Web. This tutorial will explain the basics of RDF and how it functions as a key building block of semantic systems. Mark Birbeck is the managing director of webBackplane. He has been creating software for many years, and his particular interests are the semantic web, and components that help to create dynamic, flexible, user interfaces. He has consulted, given training, spoken at conferences and contributed to books and articles on these and other topics. He is also heavily involved in the creation of new standards on these themes. Mark is an Invited Expert on both the XForms Working Group and the XHTML 2 Working Group, at the W3C. Over the years his work there has included devising and proposing RDFa."
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A First Course in RDF and RDFS (Resource Description Framework and Resource Description Framework Schema)
- Introduction to RDF and RDFS Mark Birbeck http://webBackplane.com/mark-birbeck
- RDF...a four letter word
- RDF/XML is the real villain
- The promise of XML
- Metadata: data about data
- Getting data from the web is easy...getting metadata is hard
- XML was supposed to give us this information
- Why has XML not delivered?
- We want to say: "give me everything created by J. S. Bach"
- To achieve that we need to agree how to say ' created by ' in any document
- Dublin, Ohio Photo by Sleestak66: http://www.flickr.com/people/kesselring/
- DC.Creator = "J. S. Bach"
- DC.Title = "The Well Tempered Clavier"
- Unique identifiers are a key concept in RDF
- DC.Creator DC.Title
- http://purl.org/dc/terms/ creator http://purl.org/dc/terms/ title
- Resource Description Framework
- http://purl.org/dc/terms/ creator http://purl.org/dc/terms/ title
- Triples
- The parts of a triple
- Subject A URI: http://dbpedia.org/resource/Johann_Sebastian_Bach
- XML literals "H<sub>2</sub>O"^^rdf:XMLLiteral
- Graphs
- The Well Tempered Clavier Wohltemperiertes Klavie dc:title dc:title 1685-03-21 1750-07-28 p:dateOfBirth p:dateOfDeath dc:creator
- rdf:type
- <http://dbpedia.org/resource/Johann_Sebastian_Bach> rdf:type yago:Composer . <http://dbpedia.org/resource/Johann_Sebastian_Bach> rdf:type foaf:Person .
- Lists
- Performed by Performed by dc:creator Performed by dc:creator rdf:Bag rdf:type
- Blank nodes
- Representing RDF
- RDF/XML <rdf:RDF> <yago:Composer109947232 rdf:about="http://[...]/Johann_Sebastian_Bach" > <p:birthPlace rdf:resource="http://[...]/Eisenach" /> <p:dateOfDeath rdf:datatype="http://[...]/XMLSchema#date" >1750-07-28</p:dateOfDeath> </yago:Composer109947232> </rdf:RDF>
- Turtle dbpedia:Johann_Sebastian_Bach p:dateOfBirth "1685-03-21"^^xsd:date; p:dateOfDeath "1750-07-28"^^xsd:date; p:death "1750-07-28"^^xsd:date; p:deathPlace dbpedia:Leipzig; a yago:Composer, foaf:Person .
- Storing RDF
- Sources of RDF
- Querying RDF
- Creating vocabularies
- Classes
- Composer Musician Is a type of Artist Is a type of Creator Is a type of
- Properties
- Validation v. inference
- OWL
- Conclusion