Instanciating TR135 "Device.Services.STBService.{i}.Components.FrontEnd.{i}."

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Hi,
  I need a help on making a decision on how to implement a basic TR135 data model as I'm facing problem with FrontEnds.
As specified in TR135 
(http://www.broadband-forum.org/cwmp/tr-135-1-1-0.html#D.STBService.{i}.Componen
ts.FrontEnd.{i}.), the data model could have many FrontEnd like:
Device.Services.STBService.{i}.Components.FrontEnd.{i}.DVBT.Modulation.xxxx
Device.Services.STBService.{i}.Components.FrontEnd.{i}.IP.Inbound.{i}.xxxx

I've tried a data model where I've addedthe 2 frontends (IP and DVBT) and 
created 2 FrontEnd instances using evcpe_attr_add_obj() applied on the 
multi-object FrontEnd but what I've got is wrong:

Expected:
---------
Device.Services.STBService.1.Components.FrontEnd.1.DVBT.Modulation.xxxx
Device.Services.STBService.1.Components.FrontEnd.2.IP.Inbound.1.xxxx

(note here the index of each FrontEnd)

Results:
--------
Device.Services.STBService.1.Components.FrontEnd.1.DVBT.Modulation.xxxx
Device.Services.STBService.1.Components.FrontEnd.1.IP.Inbound.1.xxxx
Device.Services.STBService.1.Components.FrontEnd.2.DVBT.Modulation.xxxx
Device.Services.STBService.1.Components.FrontEnd.2.IP.Inbound.1.xxxx

This is wrong as the schema has been duplicated across the 2 objects.

My data model declaration was:
------------------------------
Device: object
Services: object
STBService: multi-object
Components: object
FrontEnd:multi-object
DVBT: object
Modulation: object
xxxx: parameter

IP: object
Inbound: multi-object

My temporary solution is
------------------------
Instead of using multi-objects, use a simple object. However this is ugly in my 
humble opinion

Device: object
Services: object
STBService: multi-object
Components: object
FrontEnd:object
1: object       <<<<< Note here the instance number as an object
DVBT: object
Modulation: object
xxxx: parameter

2: object       <<<<< Note here the instance number as an object
IP: object
Inbound: multi-object

Is there an ideal solution to deal a such complex data model ?

Thank you

Original issue reported on code.google.com by [email protected] on 15 Aug 2011 at 7:23