See OregonDigital / ControlledVocabularyManager #624 - fix broken rdf:type values
Including below counts for number of resources in ONS which are typed using classes that don't exist, by vocabulary.
Also including a little script which can be run to reproduce the results. It uses Python rdflib to parse published data for each vocab listed at ONS.org into a graph and obtain counts for resources typed as each of five classes which are used widely in the data but do not exist.
Because the nonexistent classes use the SKOS namespace, also including some SKOS reference below.
- SKOS Simple Knowledge Organization System Namespace Document - HTML Variant
- SKOS Core Vocabulary Specification
- This document also includes information about deprecated SKOS classes and properties