LexEVS is the central EVS terminology server, developed by the Mayo Clinic with NCI and other support. LexEVS provides a common terminology model and open access to a wide range of terminologies, terminology value sets, and cross-terminology mappings needed by NCI and its partners. For users wanting to install and run a local instance of LexEVS, the LexEVS server package provides a comprehensive set of software and services to load, publish, and deploy vocabulary in a variety of web-enabled and grid environments. The LexEVS API serves users who want programmatic access to the data made available by LexEVS.
LexEVS includes the following components:
The name LexEVS highlights the merging of LexGrid, LexBIG, and EVS technologies and designates an entire suite of tools. In this suite, LexGrid is the underlying model for standard storage of controlled vocabularies and ontologies. The LexBIG API is the set of services that EVS adapters use to store and retrieve terminology metadata. LexEVS APIs are a combination of convenience methods and the LexBIG API (combining LexBIG and the EVS adapters into one set of services). For detailed information, refer to the LexEVS architecture overview.
After you have a chance to get familiar with the LexEVS suite, consider looking through the [LexEVS:LexEVS 6.0 Functionality Overview]. This lays out everything that can be done from a developer's or ontologist's point of view.
Installation and Downloads
The LexEVS 6.0 Installation Options identify the download files for each LexEVS environment that can be installed (Local Runtime, Distributed, and Grid Services).
The LexEVS Widget Library lists many widgets that have been developed for use by particular customers. These widgets have been found to be potentially useful to a wider audience. Each widget has a description for you to use in deciding if you'd like to dig deeper and find out the usefulness of the widget in your application.
Forum and Support
LexEVS 6.0 is the latest release. This release focuses primarily on alignment with standards. Other significant functionality added, especially in the areas of authoring APIs, value sets, mappings, and exporters top the list of enhancements, is as follows:
Presentations, Demos and Other Materials
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:LexEVS 6.0 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:LexEVS 6.0 Installation Guide].
Code examples, [LexEVS Example Code zip file available on GForge|https://gforge.nci.nih.gov/docman/view.php/491/23706/LexEVS_60_Example_Code.zip]. 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