LOD:KCAP analysis/PropertyDescription

From STLab

In order to represent the statistic data on properties used in the analyzed datasets we use four different tables. Notice that the data needed to fill the tables have been already retrieved in most cases. We only need to present the data in separate table for analysis purposes. Furthermore, the same data has to be available in RDF form so that we can query them. In order to represent the such data in RDF you can use the ontology available at http://ontologydesignpatterns.org/ont/lod-analysis-properties.owl (prefix prop:)

Table 1: Properties as they are defined in their vocabulary (with domain and range)

Name of the column	Explanation	Associated semantic entity
Property	The property under analysis	rdf:Property
Domain	The property domain asserted in the vocabulary.	prop:DefinedUniverse, prop:hasDomain
Range	The property range asserted in the vocabulary	prop:DefinedUniverse, prop:hasRange

Table 2: Properties, frequency of use, universes and their percentages.

Name of the column	Explanation	Associated semantic entity
Property	The property under analysis	rdf:Property
# triples	The number of triples that use the property	prop:NumberOfTriplesInDataset, prop:isDatasetNumberOfTriplesOf, path:inDataset, prop:numberOfTriples
Observed Universe	The actual universes (couples of subject type and object type) used in the triples (they can be more than one) of a certain dataset.	prop:hasObservedUniverseInDataset, prop:ObservedUniverseInDataset, path:inDataset, prop:aboutObservedUniverse, prop:ObservedUniverse, prop:hasSubjectType (domain prop:ObservedUniverse), prop:hasObjectType (domain prop:ObservedUniverse)
% of subject type	The percentage of usage of the subject type of a certain universe	prop:hasSubjectPercentage
% of object type	The percentage of usage of the object type of a certain universe	prop:hasObjectPercentage

Table 3: Properties aligned to top-level properties defined in general Content ODPs.

Name of the column	Explanation	Associated semantic entity
Property	The property under analysis	rdf:Property
Maps to	The top level property to which the property can be mapped.	prop:mapsToTopLevelProperty
Type of mapping	The type of relation for describing the mapping	owl:equivalentProperty, rdfs:subPropertyOf

Table 4: Property universes aligned to top-level classes defined in general Content ODPs. Notice that the same property used with n different couples (subject type, object type) has to be repeated n times in the table, because we have to produce n different alignments for its universes.

Name of the column	Explanation	Associated semantic entity
Property	The property under analysis	rdf:Property
Universe	The universe (subject type object type) as they are used in the triples for the property (only one for each row).	prop:ObservedUniverse
Maps to	The top level classes to which the properties is aligned to.	prop:TopLevelUniverse, prop:TopLevelClass, prop:mapsToTopLevelUniverse
Type of mapping	The type of relation for describing the mapping	owl:equivalentClass, rdfs:subClassOf