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         This extension point is used to define a delegate that evaluates validation expressions whose type is identified by a URI. The global EMF validation delegate registry, <samp>EValidator.ValidationDelegate.Factory.Registry.INSTANCE</samp>, is used to record the registration.
      
   

   
      
         
            
         
      
      
         
            
         
         
            
               
                  A fully qualified identifier of the target extension point.
               
            
         
         
            
               
                  An optional identifier of the extension instance.
               
            
         
         
            
               
                  An optional name of the extension instance.
               
            
         
      
   

   
      
         
            
         
      
      
         
            
               
                  A URI identifying the type of validation expressions that can be evaluated by the delegate.
               
            
         
         
            
               
                  The fully qualified name of a Java class implementing <samp>org.eclipse.emf.ecore.EValidator.ValidationDelegate</samp>.
               
               
                  
               
            
         
      
   

   
      
         
      
      
         2.6.0
      
   

   
      
         
      
      
         Following is an example of how a validation delegate can be registered: 
<pre>
  <extension point="org.eclipse.emf.ecore.validation_delegate" >
    <delegate uri="http://www.eclipse.org/emf/2002/Ecore/OCL" class="org.eclipse.ocl.ecore.delegate.OCLValidationDelegate"/> 
  </extension>
</pre>
      
   

   
      
         
      
      
         The value of the class attribute must represent a class that implements <samp>org.eclipse.emf.ecore.EValidator.ValidationDelegate</samp> and has a no argument contructor.
<p>
A validation delegate can be also registered from the source code with the <samp>EValidator.ValidationDelegate.Registry.INSTANCE</samp> as follows:
</p>
<pre>
  EValidator.ValidationDelegate.Registry.INSTANCE.put("http://www.eclipse.org/emf/2002/Ecore/OCL", new OCLValidationDelegate());
</pre>
      
   


   
      
         
      
      
         Copyright (c) 2009 Kenn Hussey and others.<br>
All rights reserved. This program and the accompanying materials are made available under the terms of the Eclipse Public License v1.0 which accompanies this distribution, and is available at <a 
href="http://www.eclipse.org/legal/epl-v10.html">http://www.eclipse.org/legal/epl-v10.html</a>