# Element Selection Providers Extension Point

###### Identifier:

org.eclipse.gmf.runtime.common.ui.services.elementSelection

###### Description:

This extension point facilitates the configuration of providers for the element selection service (`org.eclipse.gmf.runtime.common.ui.services.elementselection.ElementSelectionService`). Using this extension point, providers are registered to provide a list of element for the element selection composite and element selection dialog.

###### Configuration Markup:

<!ELEMENT extension (ElementSelectionProvider)>

<!ATTLIST extension

point CDATA #REQUIRED

id CDATA #IMPLIED

name CDATA #IMPLIED

>

- point - The identifier of the extension point, i.e. `org.eclipse.gmf.runtime.common.ui.services.elementSelectionProviders`.
- id - The identifier of the extension, e.g. `elementSelectionProviders`.
- name - The name of the extension, e.g. `%ext.elementSelectionProviders`.

<!ELEMENT ElementSelectionProvider (Priority , Policy?)>

<!ATTLIST ElementSelectionProvider

class CDATA #REQUIRED

>

- class - Fully qualified string containing the provider class.

<!ELEMENT Priority EMPTY>

<!ATTLIST Priority

name (Lowest|Low|Medium|High|Highest)

>

- name - The provider priority as a String, which is one of Lowest, Low, Medium, High, or Highest.

<!ELEMENT Policy EMPTY>

<!ATTLIST Policy

class CDATA #REQUIRED

>

- class - The provider policy class. Provider policies can optionally be associated with providers to determine whether the providers provide a given operation.

###### Examples:

Following is an example of a element selection provider extension:

       <extension
          id="elementSelectionProviders"
          name="%ext.elementSelectionProviders"
          point="org.eclipse.gmf.runtime.common.ui.services.elementSelectionProviders">
          <elementSelectionProvider
             class="org.eclipse.uml.ui.internal.providers.elementselection.UMLElementSelectionProvider">
             <Priority
                name="Highest">
             </Priority>
          </elementSelectionProvider>
       </extension>

Copyright (c) 2005 IBM Corporation and others.
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 http://www.eclipse.org/legal/epl-v10.html