Extending : Reference sample : How to extend a global function invoked in ECA action : Register global function definition as Eclipse extension
  
Register global function definition as Eclipse extension
1 Open the plugin.xml and then move to the ‘Extension’ tab.
2 Click button ‘Add’ This graphic is described in the surrounding text.and input ‘global’ as a filter key to find the extension point.
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3 Move to the details panel to configure the related attributes:
name: This value is the identifier of this extension.
config: Click ‘Browser’ button to find the configuration file defined in previous steps.
label: This value will be shown as the name of global functions group.
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See also
How to extend a global function invoked in ECA action