Read a point by its semantic measurand tuple (spec §26.1).
Optionalopts: TransportOptsRead and decode a single point by id.
Optionalopts: TransportOptsRead several points; refs are resolved once per call.
Optionalopts: TransportOptsEncode and write a value, validating access mode and §11.4 constraints.
Optionalopts: TransportOptsStaticcreateBind a transport to the named device profile in doc (or the only one).
Metadata access (spec §32.1).