C.6.4 - Distinguish between an ontology and folksonomy.

  • Ontology
    • A data model that represents knowledge as a set of concepts within a domain and the relationships between these concepts
        • simplify data management
        • naming/definition of types, properties and interrelationships of entities in certain discourse
        • sorts variables used for computing and establishing relationship
        • 2 standards
          • RDF — Resource Description Framework
          • OWL — Ontology Web Language
        • Triple
          • consists of Subject (Class) , Predicate (Relation) & Object (Class)
        • WordnetWeb Definition: "a rigorous and exhaustive organization of some knowledge domain that is usually hierarchical and contains all the relevant entities and their relations"
      • 3 Types
        • Domain ontology
          • representation of world concepts
          • e.g. card —> used for domains: playing card or computer hardware
          • different ontologies in same domain due to interpretation, failure in translation, etc.
        • Upper ontology
          • model of common objects
          • has core glossary
        • Hybrid ontology
          • combination of upper and domain ontology
      • SUMO - Suggested Upper Merged Ontology
        • largest formal public ontology

  • Its the practice and method of collaboratively creating “tags”
  • comes from “Folk” + “Taxonomy”
      • “Taxonomy” is a structured classification system
        • with rules and regulation
    • “Folksonomy” is different because it has no regulations
      • single or collaboratively created classifications identifying content by labels called “tags” to annotate and categorize content
        • chosen by the user
      • used to find content later on
      • available for the public
        • can be added by others
      • Basicly the “Folk” can add “Tags” (Labels) to web content (images, videos, texts, …)
    • Why is it used:
      • web used to find information
        • vast amount of information in the web
          • with different purposes and categories
      • Folksonomy adds metadata to the content (it adds meaning)

  • complex in size
  • hard to create
    • specialist needed
  • specific terminology
  • need engineering/CompSci background
  • needed for semantic web
  • must not be computer based (pre-electricity)
  • not mainly machine based
  • explicit meaning
  • complex in size
  • easy to create by everyone
  • no rules or terminology for users
  • everyone can add those tags
  • various meanings for tags = personal relation
  • based on library system (mainly networked based though)
  • error in translation
  • form of knowledge representation / data organisation

Created By: Lucie Magister
Last update: 25/02/2015

  • Class Notes.