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LexEVS and its data model LexGrid comprise a full function terminology service meeting a wide range of requirements. The Common Terminology Service 2 is a comprehensive standard defined by a broad range of community interests.

  • LexEVS 6.0 featured a comprehensive Java implementation of the CTS2 Service Functional Model in its preliminary form as a Draft Standard for Trial Use. 
  • The final specification of CTS2 was designed as a REST-specific API and LexEVS 6.1 has implemented the specification core functionality.
  • The LexEVS 6.2 implementation features a new Value Set module giving it an implementation profile consistent with other CTS2 compliant services. Furthermore it implements the latest CTS2 1.1 specification providing up to date standardization complete with the canonical JSON output.
  • The LexEVS 6.3 implementation is a minor update and provides minimal new features.
  • The LexEVS 6.4 implementation is a minor update and provides minimal new features.
  • The LexEVS 6.5 implementation updates  CTS2 to run Java 8 and provides minimal new features.
  • The LexEVS 6.5.1 implementation updates internal framework to include asserted value sets when querying for resolved value sets.

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Interactive CTS2 API Documentation has been updated and is available for LexEVS CTS2 6.5.1.  It is available here:

LexEVS 6.5.1 CTS2

Refer to LexEVS 6.5.1 CTS2 documentation for information on changes made in

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LexEVS 6.5

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Refer to LexEVS 6.5.0 CTS2 documentation for information on changes made in LexEVS 6.5 CTS2.

LexEVS 6.4 CTS2

Refer to LexEVS 6.4.1 CTS2 documentation for information on changes made in LexEVS 6.4 CTS2.

LexEVS 6.3 CTS2

Refer to LexEVS 6.3 CTS2 documentation for information and a set of examples for changes made in LexEVS 6.3 CTS2.

LexEVS 6.2 CTS2

Refer to LexEVS 6.2 CTS2 documentation for information and a set of examples for changes made in LexEVS 6.2 CTS2.

Migration Notes for CTS2

Migrating from 6.1 to 6.2 REST services.

 

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LexEVS 6.1 CTS2

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CTS2 may be implemented as a service or as a client. Clients can access terminology data with minimum implementation.

Current State of CTS2

 The current state of CTS2 as implemented in LexEVS 6.1 is outlined in a CTS2 implementation resources site

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CTS2

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The

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OMG CTS2 Specification

The OMG CTS2 specification is defined and hosted by the OMG group

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The HL7 CTS2 Service Functional Model

The HL7 CTS2 Service Functional Model as normalized to the OMG group specification is hosted by HL7

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URI Resolver

Given the RESTful nature of CTS2 along with the possibility of distributed queries over multiple terminology nodes, the need for canonical naming conventions around URI, IRI or URL becomes paramount.  To serve this purpose a prototype URI resolving service has been built for CTS2 over LexEVS.  This service attempts to provide a canonical name in the form of a URI based on curated convention and dependent upon the comprehensive storage of know other URIs known for a given terminology.   As such this service provides some securely robust resolution of a given resource despite it's possible use of an alternative URI.  

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Refer to the instructions for installing your own CTS2 over LexEVS service.

LexEVS 6.0 CTS2

Warning
This implementation, while not CTS2 compliant, still has value as it includes a number of unique features including terminology authoring and version control in a Java API.

Refer to the following:

LexEVS 6.0 CTS2 GuideLexEVS 6.0 CTS2 API