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schema version

A number in a message saying which version of its contract it follows.

A schema version identifies which revision of a message contract a payload follows, so a receiver can accept older shapes and reject or translate incompatible ones.

Examples

  • Each climate message carries "v": 1; switching temp_c to temp_f would be a breaking change, so those messages would carry v = 2 while receivers handle both.

See also

message contract user property CBOR
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