samples/actions/src/META-INF/plugin.xml

<idea-plugin>
  <!-- Plugin name -->
  <name>ActionsSample</name>

  <!-- Description -->
  <description>Sample plugin which demonstrates integration with IntelliJ IDEA action system</description>

  <!-- Plugin version -->
  <version>1.0</version>

  <!-- Plugin's vendor -->
  <vendor>IntelliJ</vendor>

  <!-- the IDEA build number which works with plugin -->
    <!--
  <idea-version since-build="2000" />
         -->
  <!-- Plugin's application components -->
  <application-components>
    <component>
      <!-- Component's implementation class -->
      <implementation-class>myActions.ActionsPlugin</implementation-class>

      <!-- Component's interface class -->
      <interface-class>myActions.ActionsPlugin</interface-class>
    </component>
  </application-components>

  <!-- Component's actions -->
  <actions>
    <!-- We use "PluginName.ComponentName.ActionName" notation for "id" to avoid conflicts -->
    <action id="ActionsSample.ActionsPlugin.GarbageCollection" class="myActions.GarbageCollectionAction" text="Collect _garbage" description="Run garbage collector">
      <keyboard-shortcut first-keystroke="control alt G" second-keystroke="C" keymap="$default"/>
      <mouse-shortcut keystroke="ctrl alt button2" keymap="$default"/>
    </action>

    <action id="Actions.ActionsPlugin.HelloWorld1" class="myActions.HelloWorldAction" text="Hello World" icon ="/general/add.png" description=""/>

    <group id="Actions.ActionsPlugin.SampleGroup" text="Sample _Menu" description="Sample group">
      <reference ref="ActionsSample.ActionsPlugin.GarbageCollection"/>
      <separator/>
       <reference ref="Actions.ActionsPlugin.HelloWorld1"/>

      <!--adds this group to the main menu-->
      <add-to-group group-id="MainMenu" anchor="last"/>
      <!--adds this group to the main toolbar before the Help action-->
      <add-to-group group-id="MainToolBar" anchor="before" relative-to-action="HelpTopics"/>
    </group>

    <!--the group below contains only the "Hello World" action defined above -->
    <group>
      <reference ref="Actions.ActionsPlugin.HelloWorld1"/>
      <!--the group is added to the editor popup menu-->
      <add-to-group group-id="EditorPopupMenu" anchor="after" relative-to-action="CutCopyPasteGroup"/>
    </group>

  </actions>

</idea-plugin>