Resolution:
As explained in the TIBCO Hawk Plug-in For TIBCO Administrator, Xtype applies to agent-specific rules. The Types Assigned to TIBCO Applications table lists in the  some of the adapters provided by TIBCO but there are more.

You can find out your adapter type if you examine the microagent names. For example, if you bring up Administrator and you click on All Service Instances and start some services that use Business Works you will have microagents that look like so:

COM.TIBCO.ADAPTER.bwengine.&ltDOMAIN>.&ltTIBCO_DEPLOYMENT>.&ltTIBCO_COMPONENT_INSTANCE>

where,
    DOMAIN is your hawk domain name.
    TIBCO_DEPLOYMENT is the application name that you specify in Administrator
    TIBCO_COMPONENT_INSTANCE is the service instance in Administrator.

The data source of a rule in this case would have the format
    COM.TIBCO.ADAPTER.&ltADAPTER_NAME>...

The ADAPTER_NAME (in the example above bwengine) is what determines the -Xtype parameter for the mar utility. For more information, please refer the section entitled "Using the Monitoring Archive Utility" in he TIBCO Hawk Plug-in For TIBCO Administrator manual.

If you create a custom adapter the same rules above will apply. To find out how you can create your own adapter, please refer to the TIBCO Designer User's Guide.