We are happy to present Open Vocabulary, one of open source projects hosted by Knowledge Hives, which delivers Java API and REST API for managing knowledge organization systems. Since version 2.0 of OpenVocabulary, we also support Python Django API to access our vocabularies.
Apart from delivering Java/REST/Django API, the goal of Open Vocabulary is to encode in SKOS/RDF standard those vocabularies that were not expressed before in RDF or SKOS, or both, before.
The REST API enables browsing through the vocabulary space following publishing the Linked Data guidelines. You can start browsing from Vocabularies section.
If you want to download the SKOS/RDF sources maintained by the Open Vocabulary project, as well as their full text indexes in Lucene format, please contact us at openvocabulary@knowledgehives.com.