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Definition of the MSL meta-model support service provider API. MSL clients can
customize various aspects of the MSL behaviour by providing a meta-model
support implementation.
<h2>Package Specification</h2>
<p>
The meta-model service provider API consists of:
<ul>
<li>{@link org.eclipse.gmf.runtime.emf.core.services.metamodel.IMetamodelSupport}:
specification of a meta-model. A meta-model provides information about
structural relationships between metaclasses ({@link org.eclipse.emf.ecore.EClass}es),
semantic procedures (similar to database triggers), etc.</li>
<li>{@link org.eclipse.gmf.runtime.emf.core.services.metamodel.IMetamodelSupportProvider}:
interface for objects that map {@link org.eclipse.emf.ecore.EPackage}s to
<code>IMetamodelSupport</code>s. Providers are registered on the
<tt>org.eclipse.gmf.runtime.emf.core.MetaModelProviders</tt> extension point</li>
</ul>
</p>
@see org.eclipse.gmf.runtime.emf.core.internal.util.MSLUtil#getMetaModel
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