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h2. Tool overview
Version 4.2 represents the current production release of NCI Enterprice Vocabulary Services.  In this release, the LexBIG Java API and LexGrid model provide the underpinnings to serve caBIG® vocabulary resources.

!Evs42stack_med.jpg|alt="diagram of EVS 43.2 design"!

This release of EVS represents a hybrid design, integrating components of legacy EVS architectures with LexGrid/LexBIG technologies. This allows the same vocabularies to be served in terms of the older EVS model (via pre-existing EVS APIs) or the LexGrid model (via the LexBIG API).

*Users should be aware that the legacy EVS model and API have been formally deprecated in this release.*  Therefore, a fundamental goal for the release is to provide a migration path that allows users to transition from the older/legacy EVS interfaces toward adoption of newer LexEVS interfaces (based on the LexGrid model and LexBIG API).

In this release, many EVS and LexGrid/LexBIG components are individually packaged, versioned, and installed. As the transition from the legacy EVS interfaces completes (in version 5.0), all packages will begin to carry the LexEVS name and abide by the same conventions for version numbering.

h3. What's new

LexEVS 4.2.1 Released February 6, 2009
[Release Notes|https://wiki.nci.nih.gov/x/LIPB]

h3. At-a-glance specifications

* Version Number and Release Date: LexEVS 4.2.1 Released February 6, 2009
* caBIG® Tool Bundle: Not applicable
* Grid Enabled:
* Compatibility Level:
* Installation Level:
* System Requirements:

h3. Installation and downloads

* [LexBIG Java API, v2.3|https://gforge.nci.nih.gov/frs/?group_id=491] 
Installs the LexBIG runtime API, source loaders, and administrative utilities developed as part of the LexEVS project. The installation package is hosted on the NCI GForge site as part of LexEVS project files.

* [LexGrid Model and Schema]

h3. LexEVS 4.2 Documentation

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h2. Support

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h2. Training materials and background information

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h2. Presentations and demos

None listed for LexEVS 4.2.

h2. Related Tools

All other [versions of LexEVS|LexEVS Releases 2.3 to Present Summarized].

h2. Additional resources

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