Object

ID

Unique identifier for many S2 objects.

ID is a string that represents a unique identifier. Almost all S2 messages carry a message_id, and many objects (such as OMBC.OperationMode) carry an id as well to easily refer to them.

It's highly recommended to use a UUID for this; while the S2 specification allows for different options, UUIDs are widely supported and fulfill all the requirements. If you use JSON to encode S2 messages, you must use UUIDs for ID.