alfresco-community-repo/config/alfresco/workflow/workflowModel.xml

<?xml version="1.0" encoding="UTF-8"?>

<model name="wf:workflowmodel" xmlns="http://www.alfresco.org/model/dictionary/1.0">

   <imports>
      <import uri="http://www.alfresco.org/model/dictionary/1.0" prefix="d"/>
      <import uri="http://www.alfresco.org/model/bpm/1.0" prefix="bpm"/>
   </imports>

   <namespaces>
      <namespace uri="http://www.alfresco.org/model/workflow/1.0" prefix="wf"/>
   </namespaces>
      
   <types>

      <!--                               -->
      <!--  Basic Review & Approve Tasks -->               
      <!--                               -->
      
      <type name="wf:submitReviewTask">
         <parent>bpm:startTask</parent>
         <mandatory-aspects>
            <aspect>bpm:assignee</aspect>
         </mandatory-aspects>
      </type>

      <type name="wf:reviewTask">
         <parent>bpm:workflowTask</parent>
         <overrides>
            <property name="bpm:packageItemActionGroup">
               <default>edit_package_item_actions</default>
            </property>
         </overrides>
      </type>


      <!--                               -->
      <!--  Adhoc Tasks -->               
      <!--                               -->
      
      <type name="wf:submitAdhocTask">
         <parent>bpm:startTask</parent>
         <properties>
            <property name="wf:notifyMe">
               <type>d:boolean</type>
               <default>false</default>
            </property>
         </properties>
         <mandatory-aspects>
            <aspect>bpm:assignee</aspect>
         </mandatory-aspects>
      </type>

      <type name="wf:adhocTask">
         <parent>bpm:workflowTask</parent>
         <overrides>
            <property name="bpm:packageActionGroup">
               <default>add_package_item_actions</default>
            </property>
            <property name="bpm:packageItemActionGroup">
               <default>edit_package_item_actions</default>
            </property>
         </overrides>
      </type>

      <type name="wf:completedAdhocTask">
         <parent>bpm:workflowTask</parent>
      </type>


      <!--                               -->
      <!--  WCM Tasks -->               
      <!--                               -->

      <type name="wf:submitWebContentTask">
         <parent>bpm:startTask</parent>
         <properties>
         	<property name="wf:from">
         		<type>d:text</type>
         	</property>
         </properties>
         <mandatory-aspects>
            <aspect>bpm:assignee</aspect>
         </mandatory-aspects>
      </type>

   </types>

</model>