/**
 @page plugin_interface Plugin Interface module

 @section Overview
Plugin Interface module provides sets of Plugin interface per Plugin Domain.<br>
And internally manages Plugin loading and symbol connection between Framework-using client and Plugins.

 @image html overview_plugin_interface.png "Software architecture of Plugin Interface module"

Header files for each Plugin Domain are located in "/usr/include/sync-agent/plugin".<br>
Each header file defines Domain-specific API set and Plugins should be implemented according to it.<br>
For detail information about each API, refer to Doxygen "Modules" page describing "Plugin" module.<br>

Plugin Interface module has following interface set(Plugin Domain) with each corresponding roles.<br>
	- <b>Plugin Manager</b><br>
	Loads Plugins and provides dynamic symbol connection to the Plugin interfaces.<br>

	- <b>Account Domain</b><br>
	Provides API to implemented platform-dependent account operation.<br>
	Plugins under Account Domain are used in Account module in Framework.<br>

	- <b>DataConverter Domain</b><br>
	Provides API to implemented platform-dependent converting operation for platform datastore.<br>
	(External data type to internal datastore item, internal dadtastore item to external data type.)<br>
	Plugins under DataConverter Domain are used in Data Adapter module in Framework.<br>

	- <b>DataConnector Domain</b><br>
	Provides API to implemented platform-dependent datastore operation for platform datastore.<br>
	External data should be converted to internal datastore item through DataConverter Plugin before using inside of platform.<br>
	Vice versa, internal datastore item should be converted to external data through DataConverter Plugin before using out of platform.<br>
	Plugins under DataConnector Domain are used in Data Adapter module in Framework.<br>

	- <b>DeviceInfo Domain</b><br>
	Provides API to fetch platform device information such as version, revision and etc.<br>
	Plugins under DeviceInfo Domain are used in Device module in Framework.<br>

	- <b>DeviceManager Domain</b><br>
	Provides API to get/set platform device policy such as MDM.<br>
	Plugins under DeviiceManager Domain are used in Device Manager module in Framework.<br>

	- <b>MO Domain</b><br>
	Provides API to get/set Management Object(MO).<br>
	1 Plugin required per 1 MO tree and need to parse DDF into MO tree(DB) before using.<br>
	Plugins under MO Domain are used in Device Manager module in Framework.<br>

	- <b>NetworkAccess Domain</b><br>
	Provides API to communicate with external server.<br>
	1 Plugin required per 1 protocol.<br>
	Plugins under NetworkAccess Domain are used in Network Access module in Framework.<br>

	- <b>PlatformMonitor Domain</b><br>
	Provides API to monitor specific event platform device module originates.<br>
	1 Plugin required per 1 kind of system event.<br>
	Plugins under PlatformMonitor Domain are used in Platform Monitor module in Framework.<br>
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