Hello Marcel,
I have incorporated your feedback into the document . Please let me know 
if anything needs to be changed.

Thanks
Raji

			Callhistory Adapter-Agent


CallHistory is a built in plugin for ofono. It uses CallHistoryAgent api 
exposed by client to push voice call history information. 
CallHistoryAgent api is a service interface exposed by client over dbus. 
Plugin exposes CallHistory interface that CallHistoryAgent registers and 
unregisters with. if the CallHistoryAgent registers with CallHistory 
then plugin pushes the history information to the agent soon as it 
receives from ofono, otherwise it caches the data in a disk file until 
agent registers, once agent registers plugin will read the data from the 
disk file and pushes all the records to it.

CallHistory:

it is going to register and unregister the agent. It calls the methods 
on the agent for delivering history information whent the agent is up 
and running. The history record will be written to the disk if agent 
method returns error or if the agent is not running.


CallHistory hierarchy
=============

Service : org.ofono
Interface : org.ofono.CallHistory
Object path : [variable prefix]/{modem0,modem1,...}/CallHistory

Methods 	void RegisterAgent (objectpath)

			RegisterAgent method registers the agent object path. Methods on this 
			agent will be called if history needs to push data.

			Possible Errors: [service].Error.InvalidArguments
			[service].Error.InvalidFormat
			[service].Error.InUse

		void UnregisterAgent (objectpath)

			UnregisterAgent method unregister the already registered agent object path.

			Possible Errors: [service].Error.InvalidArguments
			[service].Error.InvalidFormat
			[service].Error.InUse

CallHistoryAgent hierarchy
================

Service Name : Unique Name
Interface : org.ofono.CallHistoryAgent
Objectpath : Freely definable

Methods 	void SendHistory( array{dict})

			This method gets called by ofono to deliver an array of records. Each 
			record is represented as a dictionary, all the dict properties are 
			described in the "Properties" section.

			Possible Errors: [service].Error.Unsuccessful

		void Release()
			Cleans up agent, assumes that agent is already unregistered, so not 
			needed to unregister.

Properties
=======
		integer Uid [Read Only]
			Integer representing the unique id of the history record

		string Calltype [Read Only]
			string representing the call type. Call type can be one of the following 
			three alternatives
			"outgoing" - it is an outgoing call
			"incoming" - it is an incoming call
			"missed" - it is a missed call

		string LineIdentification [Read Only]
			string representing the LineIdentification , for outgoing call it is the 
			phone number dialed. For Incoming call it is the CLIP, or COLP if 
			received by the underlying implementation.

		string StartTime [Read Only]
			String representing start time of the call

		string EndTime [Read Only]
			String representing end time of the call