Topic Convention

umh.v1.<location_path>.<data_contract>[.<virtual_path>].<tag_name>

Segment	Filled by tag_processor meta field	Description & rules
umh.v1	—	Constant product / schema generation prefix.
location_path	msg.meta.location_path	Hierarchical location path (often based on ISA-95 but adaptable to any naming standard like KKS) – level0 (enterprise) is mandatory, additional levels are optional. Supports generic level0, level1, level2, etc. for flexibility across different organizational standards.
data_contract	msg.meta.data_contract	Needs to start with an underscore. Logical model that the payload conforms to (e.g. _historian, Pump, TemperatureSensor).
virtual_path†	msg.meta.virtual_path (optional)	Zero-to-many sub-segments used by explicit contracts to address sub-models or folders (e.g. motor.diagnostics).
tag_name	msg.meta.tag_name or auto-derived	Leaf field inside the contract (temperature, power, status).

† optional segments – omitted when empty.

With this convention every topic uniquely answers:

• Where did the data originate? → location_path

• What does it represent? → data_contract + (virtual_path) + tag_name

• Version of the infrastructure → umh.v1