# OCL Validation Example

## Introduction

This example describes the usage of validation constraints within the SDK. It demonstrates how to contribute constraints in XML, written in OCL for the library meta-model.

## References

Please refer to the document EMF Validation Framework Examples Overview for reviewing the library meta-model used as the basis for demonstrating the capabilities in this example.

## Description

This example plug-in is named `org.eclipse.emf.validation.examples.ocl`. This example requires the Validation Adapter Example functionality and therfore should also be installed. This plug-in does not contribute any menu items. It defines a live and a batch constraint in the `plugin.xml` file. This plug-in uses the `EValidator` implementation defined in the plug-in `org.eclipse.emf.validation.examples.adapter`. The funtionality is triggered by invoking the menu item Validate from the editor's context menu or main menu.

Please refer to the tutorial OCL Validation Tutorial for reviewing the code samples within this example.

## Usage

Refer to this example if you need:

1. To contribute constraints in XML, written in OCL.

Copyright (c) 2000,2005 IBM Corporation and others.