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The SBE protocol standard allows for a degree of backward compatibility via Template Extension rules, to allow message consumers to be using older versions of the message schema than message publishers, and vice versa. The following sections outline the rules and logic required to ensure that backward compatibility problems are reduced to a minimum.

Obviously this backward compatibility is only of use if the added types, fields, or messages are not actually required for the implemented business processes. If the new features are required then the client must of course implement the necessary changes to support the new schema in full.

The following Template Extensionrules ensure backward compatibility:

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