If you want to use the action inbox service for an application, 
you need to define the structure of the information in the notification
in an XML file. The following shows the DTD for this file. 
You must store the file in the etc/actioninbox directory and also
specify it in the configuration of the action inbox service. 

?xml version="1.0" encoding="UTF-8" ?>
<!ELEMENT CategoryGroup (Description+, Category+)>
<!ATTLIST CategoryGroup
          Name CDATA #REQUIRED>
<!ELEMENT Description EMPTY>
<!ATTLIST Description
          ID CDATA #REQUIRED
          Language CDATA #REQUIRED
          Description CDATA #REQUIRED>
<!ELEMENT Category (Description+,Creation?,Deletion?,DoneHandling?,
          UsersOnly?,Action*,RequiredItemProperties,ResourceType)>
<!ELEMENT Description EMPTY>
<!ATTLIST Description
          ID CDATA #REQUIRED
          Language CDATA #REQUIRED
          Description CDATA #REQUIRED>
<!ELEMENT Creation EMPTY>
<!ATTLIST Creation
          Type (update | add) #IMPLIED>
<!ELEMENT Deletion EMPTY>
<!ATTLIST Deletion
          Type (allowed | disallowed) #IMPLIED>
<!ELEMENT DoneHandling EMPTY>
<!ATTLIST DoneHandling
          Type (delete | done | doneauthor) #IMPLIED>
<!ELEMENT UsersOnly EMPTY>
<!ATTLIST UsersOnly
          Flag (true | false) #IMPLIED>
<!ELEMENT Action (ActionName, ActionType, Description*, Properties)>
<!ELEMENT ActionName EMPTY>
<!ATTLIST ActionName
          Name CDATA #REQUIRED
          Class CDATA #REQUIRED>
<!ATTLIST ActionType
          Type CDATA #REQUIRED
          Namespace CDATA #REQUIRED>
<!ELEMENT Description EMPTY>
<!ATTLIST Description
          ID CDATA #REQUIRED
          Language CDATA #REQUIRED
          Description CDATA #REQUIRED>
<!ELEMENT Properties (Property*)>
<!ELEMENT Property EMPTY>
<!ATTLIST Property
          Key CDATA #REQUIRED
          Value CDATA #REQUIRED>
<!ELEMENT RequiredItemProperties (Property*)>
<!ELEMENT ResourceType EMPTY>
<!ATTLIST ResourceType
          Type CDATA #REQUIRED>
<!ELEMENT Property EMPTY>
<!ATTLIST Property
          Key CDATA #REQUIRED>