plone.app.discussion/plone/app/discussion/contentrules.zcml

<configure
  xmlns="http://namespaces.zope.org/zope"
  xmlns:zcml="http://namespaces.zope.org/zcml">

  <!-- Content Rules events -->
  <configure zcml:condition="installed plone.contentrules">

    <interface
      interface="plone.app.discussion.interfaces.ICommentAddedEvent"
      type="plone.contentrules.rule.interfaces.IRuleEventType"
      name="Comment added"
      />

    <interface
      interface="plone.app.discussion.interfaces.ICommentRemovedEvent"
      type="plone.contentrules.rule.interfaces.IRuleEventType"
      name="Comment removed"
      />

    <interface
      interface="plone.app.discussion.interfaces.IReplyAddedEvent"
      type="plone.contentrules.rule.interfaces.IRuleEventType"
      name="Comment reply added"
      />

    <interface
      interface="plone.app.discussion.interfaces.IReplyRemovedEvent"
      type="plone.contentrules.rule.interfaces.IRuleEventType"
      name="Comment reply removed"
      />
      
    <interface
      interface="plone.app.discussion.interfaces.ICommentPublishedEvent"
      type="plone.contentrules.rule.interfaces.IRuleEventType"
      name="Notify user on comment publication"
      />
      
    <interface
      interface="plone.app.discussion.interfaces.ICommentDeletedEvent"
      type="plone.contentrules.rule.interfaces.IRuleEventType"
      name="Notify user on comment delete"
      />

  </configure>


  <!-- Content rules subscribers -->
  <configure zcml:condition="installed plone.app.contentrules">

    <subscriber
      for="plone.app.discussion.interfaces.ICommentAddedEvent"
      handler=".contentrules.execute_comment"
      />

    <subscriber
      for="plone.app.discussion.interfaces.ICommentRemovedEvent"
      handler=".contentrules.execute_comment"
      />

    <subscriber
      for="plone.app.discussion.interfaces.IReplyAddedEvent"
      handler=".contentrules.execute_comment"
      />

    <subscriber
      for="plone.app.discussion.interfaces.IReplyRemovedEvent"
      handler=".contentrules.execute_comment"
      />
      
    <subscriber
      for="plone.app.discussion.interfaces.ICommentDeletedEvent"
      handler=".contentrules.execute_comment"
      />
      
    <subscriber
      for="plone.app.discussion.interfaces.ICommentPublishedEvent"
      handler=".contentrules.execute_comment"
      />

  </configure>

  <!-- Content rules strings -->
  <configure zcml:condition="installed plone.stringinterp">
    <adapter
      for="zope.interface.Interface"
      provides="plone.stringinterp.interfaces.IStringSubstitution"
      factory=".contentrules.Id"
      name="comment_id"
      />

    <adapter
      for="zope.interface.Interface"
      provides="plone.stringinterp.interfaces.IStringSubstitution"
      factory=".contentrules.Text"
      name="comment_text"
      />

    <adapter
      for="zope.interface.Interface"
      provides="plone.stringinterp.interfaces.IStringSubstitution"
      factory=".contentrules.AuthorUserName"
      name="comment_user_id"
      />

    <adapter
      for="zope.interface.Interface"
      provides="plone.stringinterp.interfaces.IStringSubstitution"
      factory=".contentrules.AuthorFullName"
      name="comment_user_fullname"
      />

    <adapter
      for="zope.interface.Interface"
      provides="plone.stringinterp.interfaces.IStringSubstitution"
      factory=".contentrules.AuthorEmail"
      name="comment_user_email"
      />
  </configure>

</configure>