plugins/org.eclipse.xtend.backend.ui/plugin.xml

<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.4"?>
<plugin>
   <extension-point id="MiddleEndConfigurer" name="Middleend Configurer" schema="schema/MiddleEndConfigurer.exsd"/>
   <extension
         id="org.eclipse.xtend.backend.compiler.BackendBuilder"
         name="M2T Backend Compiler"
         point="org.eclipse.core.resources.builders">
      <builder
            hasNature="true">
         <run
               class="org.eclipse.xtend.backend.ui.compiler.BackendBuilder">
         </run>
      </builder>
   </extension>
   <extension
         id="org.eclipse.xtend.backend.BackendNature"
         name="M2T Backend Compiler"
         point="org.eclipse.core.resources.natures">
      <runtime>
         <run
               class="org.eclipse.xtend.backend.ui.builder.BackendNature">
         </run>
      </runtime>
      <builder
            id="org.eclipse.xtend.backend.compiler.BackendBuilder">
      </builder>
   </extension>
   <extension
         point="org.eclipse.ui.popupMenus">
      <objectContribution
            adaptable="true"
            id="org.eclipse.xtend.backend.ui.AddBackendNature"
            nameFilter="*"
            objectClass="org.eclipse.core.resources.IProject">
         <action
               class="org.eclipse.xtend.backend.ui.builder.ToggleBackendNature"
               enablesFor="+"
               id="org.eclipse.xtend.backend.ui.addRemoveNatureAction"
               label="Add M2T Backend Compiler"
               menubarPath="org.eclipse.ui.projectConfigure/additions">
         </action>
         <visibility>
         	<not>
	            <objectState
    	              name="nature"
        	          value="org.eclipse.xtend.backend.BackendNature">
            	</objectState>
            </not>
         </visibility>
      </objectContribution>
      <objectContribution
            adaptable="true"
            id="org.eclipse.xtend.backend.ui.RemoveBackendNature"
            nameFilter="*"
            objectClass="org.eclipse.core.resources.IProject">
         <action
               class="org.eclipse.xtend.backend.ui.builder.ToggleBackendNature"
               enablesFor="+"
               id="org.eclipse.xtend.backend.ui.addRemoveNatureAction"
               label="Remove M2T Backend Compiler"
               menubarPath="org.eclipse.ui.projectConfigure/additions">
         </action>
         <visibility>
	            <objectState
    	              name="nature"
        	          value="org.eclipse.xtend.backend.BackendNature">
            	</objectState>
         </visibility>
      </objectContribution>
   </extension>
   <extension
         id="backendProblem"
         name="M2T Backend compilation problem"
         point="org.eclipse.core.resources.markers">
      <super
            type="org.eclipse.core.resources.problemmarker">
      </super>
      <persistent
            value="true">
      </persistent>
   </extension>

</plugin>