Querry regarding MarkerService in QDDIM

We are refering to the class MarkerService [QDDIM]  in the 
document  <draft-ietf-policy-qos-device-info-model-08.txt>.

We are unable to associate the MarkerService with its type.

We feel that a property MarkerServiceType needs to be added to 
MarkerService Class with enumerations for the following

1. PreambleMarkerService
2. ToSMarkerService
3. DSCPMarkerService
4. 8021QMarkerService

Does any association will relate these classes ? 

The DropperService has properties DropperType, OtherDropperType, DropFrom.
Can MarkerService class also have similar properties ?. 

Kindly inform,if there is any latest draft on this. 

Thanx
Regards

Girish Pujari
Mahindra British Telecom
Pune - INDIA

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