Table 2 OQuaRE metrics and a brief description of how we calculate them

Mean number of annotation properties per class

Number of restrictions of the ontology per classes

Number of superclasses divided by the number of class

minus the subclasses of Thing

Mean number of individuals per class

Length of the largest path from Thing to a leaf class

Mean number of subclasses per class

Mean number of superclasses per leaf class

Mean number of the direct subclasses per class minus

the subclasses of Thing

Mean number of object and data property usages

per class

Mean length of all the paths from leaf classes to Thing

Number of usages of object and data properties and

superclasses divided by the number of classes minus

the subclasses of Thing

Number of usages of object and data properties divided

by the number of subclassof relationships and properties

Mean number of classes with more than 1 direct ancestor

Mean number of properties and relationships per class