LexEVS Downloads

Current Release

Version 6.5.4 August, 2020

Functionality Overview

The LexEVS 6.5.4 Functionality Overview lays out everything that can be done from a developer's or ontologist's point of view.

API's, Installation, and Downloads

LexEVS offers both a regular java api and a somewhat more limited remote method invocation java api that runs on the Tomcat application server.  Additionally, it runs behind the CTS2 REST Services.  It currently uses the MySQL database as as its datastore.  


The installation overview provides an introduction to the different environments that can be installed. Refer to the LexEVS 6.x Installation Guide for more information.

Downloadable software

The LexEVS 6.5.4 Installation Options identify the download files for each LexEVS environment that can be installed (Local Runtime and Distributed Services).


LexEVS License Statement

Forum and Support

LexEVS Issues and Discussion  Exit Disclaimer logo
Users and developers can report and discuss issues regarding the LexEVS application on its GitHub site.

What's New in LexEVS 6.5.4

Features - refer to LexEVS 6.5.4 Release Notes

LexEVS 6.5.4 Technical stack updates.


CTS2 References on this Wiki

LexEVS 6.x REST CTS2 Service


The contribution process is described in LexEVS Community Code Contribution. LexEVS source code is in the NCIP channel of Github Exit Disclaimer logo

Presentations, Demos, and Other Materials


Refer to LexEVS Presentations.


  • Query Service with Program Examples, included in the LexEVS base installation. Both Lexical Set Operations and Graph Operations are included for common vocabulary functions using a sample vocabulary and CodedNodeSet. This is described in the LexEVS 6.x Installation Guide.
  • Example Programs and Verification Test Suite, included in the LexEVS base installation. The Example Programs provide a limited interactive demonstration of LexEVS capabilities. Both are explained in the LexEVS 6.x Installation Guide.
  • LexEVS Example Code zip file. These are code examples for subjects of frequently asked questions such as creating a coded node graph using the LexBIG convenience methods.

Documentation and Training