semantic web

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  • -DARSHINI PARIKH

    (TechKnowXpress)

  • TechKnowXpress

    WHAT IS SEMANTIC

    WEB?

    The Semantic Web is an extension of the Web through standards by the World Wide Web Consortium (W3C)

  • TechKnowXpress

    ADVANTAGES OF SEMANTIC

    WEB OVER TRADITIONAL

    WEB

    Improve the understandability and interpretability of data for processing by machines

    Enables inference of new knowledge from existing information

    Integration of heterogeneous data

  • TechKnowXpress

    SEMANTIC WEB

    TECHNOLOGY STACK

  • TechKnowXpress

    BUILDING BLOCKS OF SEMANTIC

    WEB

    RDF Resource Description Framework

    ONTOLOGIES

    SPARQL

  • TechKnowXpress

    RESOURCE DESCRIPTION FRAMEWORK

    (RDF)

    Standard model for data interchange on the Web.

    Facilitates data merging even if the underlying schemas differ.

    Supports the evolution of schemas over time without requiring all the data consumers to be changed.

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    RESOURCE DESCRIPTION FRAMEWORK

    (RDF) (conti)

    RDF extends the linking structure of the Web to use URIs to name the relationship between things as well as the two ends of the link.

    Allows structured and semi-structured data to be mixed, exposed, and shared across different applications.

    RDF Triple:Rdf: subject.Rdf: predicate.Rdf: object.

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    RESOURCE DESCRIPTION FRAMEWORK

    SCHEMA(RDFS)

    RDFS is a set of classes with certain properties using the RDF extensible knowledge representation data model, providing basic elements for the description of ontologies

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    ONTOLOGIES

    An ontology is a formal specification of a shared conceptualization

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    TYPES OF ONTOLOGIES DOMAIN

    ONTOLOGY

    TASK ONTOLOGY

    APPLICATIONONTOLOGY

    TOP LEVEL ONTOLOGY

    The ontology which describes very general concepts across all knowledge domains is called top level ontology

  • TechKnowXpress

    TYPES OF ONTOLOGIES

    (conti)

    DOMAIN ONTOLOGY

    TASK ONTOLOGY

    APPLICATIONONTOLOGY

    TOP LEVEL ONTOLOGY

    The ontology which provides a specification or detailed description of elements and relationships of tasks to explain how tasks can exist and be used in a specific field or environment.

  • TechKnowXpress

    TYPES OF ONTOLOGIES

    (conti)

    DOMAIN ONTOLOGY

    TASK ONTOLOGY

    APPLICATIONONTOLOGY

    TOP LEVEL ONTOLOGY

    The ontology which represents concepts belonging to part of the world is called domain ontology

  • TechKnowXpress

    TYPES OF ONTOLOGIES

    (conti)

    DOMAIN ONTOLOGY

    TASK ONTOLOGY

    APPLICATIONONTOLOGY

    TOP LEVEL ONTOLOGY

    The ontology which is engineered for a specific use or application focus and whose scope is specified through testable use cases is called application ontology

  • TechKnowXpress

    SPARQL

    SPARQL Protocol And RDF Query Language

    SPARQL is an RDF query language

    SPARQL allows for a query to consist of triple patterns, conjunctions, disjunctions and optional patterns

    SPARQL is able to retrieve and manipulate data stored in Resource Description Framework (RDF) format

  • TechKnowXpress

    OWL WEB ONTOLOGY LANGUAGE

    The Web Ontology Language (OWL) is a family of knowledge representation languages for authoring ontologies.

    OWL exists in various flavors: OWL EL

    OWL RL

    OWL QL

    OWL2 DL

    OWL2 Full

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    USE OF OWL

    WEB PORTALS

    Content-based searches for non-text media

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    USE OF OWL

    (conti)

    MULTIMEDIA COLLECTIONS

    Categorization rules used to enhance search

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    USE OF OWL

    (conti)

    CORPORATE WEB SITE MANAGEMENT

    (1) Automated Taxonomical Organization of data and documents(2) Mapping Between Corporate Sectors (mergers!)

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    USE OF OWL

    (conti)

    DESIGN DOCUMENTATION

    (1) Explication of derived assemblies

    (2) Explicit Management of Constraints

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    USE OF OWL

    (conti)

    INTELLIGENT AGENTS

    (1) Expressing User Preferences and/or Interests(2) Content Mapping between Web sites

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    USE OF OWL

    (conti)

    WEB SERVICES AND UBIQUITOUS COMPUTING

    (1) Web Service Discovery and Composition(2) Rights Management and Access Control

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    GIST

  • TechKnowXpress