If perhaps it may serve to assist other developers who may be looking at the Catalyst project, there’s a source code repository publishing a small number of ontologies: https://github.com/catalyst-fp7/ontology
The ontologies are primarily in Turtle format, as with reference to the W3C Semantic Web standards track: (Turtle - Terse RDF Triple Language). The Turtle format – an RDF encoding format for structured ‘trie’ data – as well as the N3 and RDF+XML formats would be supported by a number of software programming toolkits, such as the Sesame API in Java, Redland librdf (Python, Lua, Ruby, PHP, PERL) and others. In a manner of desktop tooling, the Protege ontology platform, of course, also supports applications of the Turtle format. In a context of server architectures and desktop tools, those formats are also supported with Franz Allegrogrph, such that may be applied as a SPARQL service provider and may be utilized with the corresponding Gruff tool.
Perhaps it may serve as to help with regards to metrics and analysis that there are those additional tools available?
Personally, I wonder if it may be appropriate to develop any manner of technical documentation about the RDFS classes and property kinds defined in the ontologies? Perhaps a formal reference document could be produced in the Darwin Information Typing Architecture (DITA) format, alternate to a quicker Javadoc-like reference documentation? If each class, each property kind, and each individual resource was provided with a sort of a documentation – whether or not immediately in the ontology, but such that the URI for each documented resource would be referenced in a normative manner – perhaps it could serve to provide some assistance to content creators ostensibly applying the ontologies.
May it be possible, moreover, to integrate the Catalyst ontologies with other linked open data models? such as, for instance, the AFS Ethnographic Thesaurus, as also published in the US Library of Congress Linked Data Service – if not also the SKOS edition of the UNESCO Thesaurus. Perhaps those could be integrated with something of a content curation and content annotation service such as Diigo?
Has anyone proposed to develop a Catalyst mobile app, I wonder?