Wprowadzenie do Web 3.0

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Prezentacja z 25 Jesiennych Spotkań PTI w Mrągowie, 14.10.2009

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  • 1)OK – first step to deliver semantic web – is to provide semantic descriptions
    2)In order to do that – we can use widely addopted RDF
    3)What is RDF? What are the properties?
    4)RDF is not XML – as RDF is based on graph model
    5)How machines can process it ?
  • Now, RDF is a really nice – but what more can we do with it?
    First – obvious: objects/resources and relationsships
    Than – easy extend the model with new relantionships, types, etc
    Finally – we can easily integrate stuff
    But be aware – RDF support many points of view – if you want to be sure – you need to exend the knowledge with more sentences to know which „conflicting” statement is right for you
  • RDF alone is not enough – it just delivers a graph – but we need to provide some constraints, knowledge, etc
    Ontologies are the key concept to do so
    They are based on the social agreement
    There are several ways to express ontologies
  • The simplest ontology we can define is with RDF Schema
    RDFS defines a small vocabulary ...
    It can be easily used to define other vocabularies
    Like in our example ...
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