LexEVS featured a comprehensive Java implementation of the CTS2 Service Functional Model in it's preliminary form as a Draft Standard for Trial Use in LexEVS 6.0. The final specification of CTS2 was designed as a REST specific API and LexEVS 6.1 has implemented the specification core functionality.
LexEVS 6.1 CTS2
The current state of CTS2 as implemented in LexEVS 6.1 is outlined in a CTS2 implementation resources site.
The full CTS2 specification is hosted by the OMG group.
The full CTS2 Service Functional Model as normalized to the OMG group specification is hosted here.
LexEVS 6.0 CTS2
This implementation, while no longer valid for CTS2 compliance, still has value including a number of unique features including terminology authoring and version control in a Java API.