ckanext-semantic extracts semantic data of CKAN by integrating LODStats and personalization features. Features include: enhanced search (search for vocabularies, classes, properties, geographical and temporal coverage), new SPARQL search type, SPARQL subscriptions, enriched dataset pages (used vocabularies, geographical/temporal coverage), similar datasets, and personalized recommendations. Requires Virtuoso v6, FedX v2 (for multiple endpoints), LODStats, and Redland rdflib. A db.sql file must be applied to add necessary tables. CRON jobs needed for periodical statistics updates. May need a Cloudmade key. Very old extension from 2013, last commit March 2013.