Static Conformance Requirements

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	SyncML®: Synchronizing and Managing Your Mobile Data By Uwe Hansmann, Riku Mettälä, Apratim Purakayastha, Peter Thompson, Phillipe Kahn
	Table of Contents
	Chapter 6.  Representation Protocol

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The Representation Protocol also defines a set of Static Conformance Requirements (SCR) tables. These tables define what a product is required to support. The tables also indicate optional commands or Elements. Here is an example from the SCR tables:

Command	Support of Synchronization Server		Support of Synchronization Client
	Sending	Receiving	Sending	Receiving
Chal	MUST	MUST	MAY	MUST

This example is from the Common Use Elements section of the SCR tables. For a Server, the Chal command is required for sending and receiving. However, for a Client, it is only required to receive the Chal command.

According to the RFC 2119, MAY indicates entirely optional, SHOULD indicates strongly suggested (i.e. a good technical reason for not implementing), and MUST indicates required.

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