====== L: 11/12/2020 ======

**Master in Informatics and Computing Engineering\\
Information Description, Storage and Retrieval\\
Instance: 2020/2021**
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====== Lecture #9 :: 11/12/2020 ======

===== Goals =====

By the end of this class, the student should be able to:
  * List the components of an ontology and the related OWL constructs;
  * Use the concepts of class and property of OWL to construct models of application domains;
  * Create an ontology for a selected domain;
  * Represent the ontology using an editing tool.

===== Topics =====

  - Ontologies
    * Introduction
    * Ontology Development
  - OWL: Web Ontology Language
    * Classes
    * Properties
    * Class descriptions
    * Property restriction 

===== Bibliography =====

  *  W3C, //[[http://www.w3.org/TR/owl2-primer/|OWL 2 Web Ontology Language Primer (Second Edition)]]//, W3C Recommendation 11 December 2012, last accessed December 2020

===== Materials =====

  * Grigoris Antoniou and Frank van Harmelen, //A Semantic Web Primer//, 2nd edition, The MIT Press, 2008 (chapter 4)
  * Protégé. //User Documentation//, online at [[http://protegewiki.stanford.edu/wiki/Main_Page|Protégé wiki]], [[http://protegeproject.github.io/protege/|Protégé Documentation]] last accessed December 2020
  * Apache Software Foundation, //Apache Jena//, online at [[http://jena.apache.org/|Apache]], last accessed December 2020
  * GraphDB Semantic Graph Database, online at [[ http://graphdb.ontotext.com/|GraphDB]], last accessed December 2020
  * Clark & Parsia, //[[https://github.com/complexible/pellet|Pellet: An Open Source OWL DL reasoner for Java]]//, last accessed December 2020

===== Tasks =====

  * Make an iteration over the ontology for the domain;
  * Use the Protégé tool to represent the ontology, validate it and make inferences;
  * Explore the ontology with sample queries;
  * Consider your datasets as an input for populating the ontology.

===== Summary =====

  * OWL: Web Ontology Language. Classes. Properties. Class descriptions. Property restrictions.
  * Work on Milestone 3 in the Course Project, "Semantic Web".
  * Exploitation of ontologies.

 --- //JCL, MCR, SSN//

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