Foundational Quality Metrics (FQM)
The Foundational Quality Metrics(FQM) vocabulary describes a set of objective metrics as the fundamental requirements that RDF resources must meet to maximize the potential of linked resources.
1) Check if an RDF resource is resolvable (Boolean), or 2) check if URIs in that RDF resource are resolvable, and measure the proportion of non-resolvable URIs to all unique URIs.
1) Check if an RDF resource is parsable (Boolean), or 2) check if URIs in that RDF resource which already indicate RDF content-type are parsable, and measure the proportion of non-parsable URIs to all unique URIs in that RDF resource;
Measure the proportion of undefined URIs to all unique URIs in an RDF resource.
1)Measure the proportion of classes which are incorrectly used as a predicate to all unique classes; or 2) measure the proportion of properties which are incorrectly used as a class to all unique properties.
Misuse Owl datatype or object properties metric
Measure the proportion of misused ‘owl:datatypeProperty‘ (or ‘owl:objectProperty‘ ) properties to all properties.
Usage of Deprecated Classes or Deprecated Properties
Measure the proportion of deprecated classes or properties to all unique classes or properties.