Difference between revisions of "Base Metrics"

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(Axiom)
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==Axiom==
 
==Axiom==
 
Axioms are basics statements of an ontology, they are used to obtain information about classes and properties.
 
Axioms are basics statements of an ontology, they are used to obtain information about classes and properties.
 +
Thus they are used to connect classes and properties identifiers to their specification.
  
 
==Logical axiom ==
 
==Logical axiom ==
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#''http://www.enzyklopaedie-der-wirtschaftsinformatik.de/lexikon/daten-wissen/Wissensmanagement/Wissensmodellierung/Wissensreprasentation/Semantisches-Netz/Ontologien''
 
#''http://www.enzyklopaedie-der-wirtschaftsinformatik.de/lexikon/daten-wissen/Wissensmanagement/Wissensmodellierung/Wissensreprasentation/Semantisches-Netz/Ontologien''
 
#''https://www.w3.org/TR/owl-ref/''
 
#''https://www.w3.org/TR/owl-ref/''
 +
#''https://www.w3.org/TR/2004/REC-owl-semantics-20040210/syntax.html''

Revision as of 10:03, 15 June 2016

Base Metrics comprise of simple metrics, like the counting of classes, axioms, objects etc. So it shows the quantity of ontology elements. For these Metrics we chose:

Axiom

Axioms are basics statements of an ontology, they are used to obtain information about classes and properties. Thus they are used to connect classes and properties identifiers to their specification.

Logical axiom

These special kind of axioms are universally valid.

Class

Classes in ontologies are concepts. These classes can contain other classes or individuals. In OWL there a generally a Thing-Class, which is a universal class. So every user defined class is a SubClass of the Thing-Class

With this metric we count the classes, including the thing-class, to create a view on the quantity of classes.

Total class

Individuals

Individuals are the instances of the classes. This metric counts these instances, one class could have a set of instances.

Total Individual

Property

In OWL there are two types of properties:

Object property

Object properties link individuals to individuals.

Total Object property

Data property count

Other then the Object properties the Data properties link individuals to data values

Total data property

Sources

  1. http://www.enzyklopaedie-der-wirtschaftsinformatik.de/lexikon/daten-wissen/Wissensmanagement/Wissensmodellierung/Wissensreprasentation/Semantisches-Netz/Ontologien
  2. https://www.w3.org/TR/owl-ref/
  3. https://www.w3.org/TR/2004/REC-owl-semantics-20040210/syntax.html