A validated BDEW process-type code (Prüfidentifikator, PID).
Prüfidentifikatoren are 5-digit decimal codes in the range 10000–99999
that identify the business process variant of an EDI@Energy message
(e.g. 55001 for GPKE Lieferbeginn, 11001 for WiM Zählerstand).
Energy commodity — used for commodity-aware PID routing.
INSRPT PIDs 23001/23003/23004/23008 are shared between WiM Strom (5 Werktage
APERAK Frist) and WiM Gas (10 Werktage APERAK Frist). When the ingest layer
can determine the commodity of an incoming message — for example from the
MaLo cache — it supplies a Sparte to PidRouter::route_with_sparte so
that the correct workflow is selected.