1.1 General This International Standard is Part 100 of IEC 61968. It defines how messages may be exchanged between co-operating systems in order to facilitate the transfer of application specific data. Such application-specific data include but are not limited to the message payloads defined in IEC 61968 (Parts 3-9 and Part 13), IEC 61970 and IEC 62325. 1.2 About This International Standard This International Standard provides normative definitions for: " a set of message archetypes (clause 5); " a set of message exchange patterns that both sending and receiving systems are expected to implement (clause 6); " the exact format of the messages that are to be transmitted over the various integration technologies including a precise description of the information that each message must contain (clause 7); " a set of constraints and conventions to which applications must adhere in order to facilitate message exchange using IEC 61968-100 (clause 8); " the details of how IEC 61968-100 messages should be implemented using various underlying transport mechanisms (clause 9). 1.3 What is not covered by this International Standard Security considerations lie outside the scope of IEC 61968-100. This document defers to the IEC 62351 series for definitions and practices relating to the secure transmission of messages.