# Business data request from the MSB to the NB — NB view ## Process flow from the perspective of the NB \nSystem diagram: Geschäftsdatenanfrage vom MSB an NB — view of NB\n\n\nCustomer backend system\n\nMACO APP · NB\n\nMarket partner\n\n\n\n1. Geschäftsdatenanfrage\n\nMSB (Strom / Gas)\n\nAS4\n17126\n\nLoad data for the incoming\ncheck\n\n\nMesslokation lesen\n\nAPI\n\nCreate transaction\n\n\nCreate process data\n\nAPI\n\nEBD check: E_3004\nGeschäftsdatenanfrage zu\nStammdaten prüfen\n\n\nTrigger follow-up process:\n19101, 44060\n\n\nTriggered by incoming\nmessage: 17126\n\n\nLoad data for processing\n\n\n3 read APIs called\n\nAPI\nlisted at the step\n\n2. Antwort\n\n\nMSB (Strom / Gas)\n\nAS4\n19101, 44060\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n"} gesamt={"\nSequence diagram: Geschäftsdatenanfrage vom MSB an NB — view of NB\n\n\nBackend (customer)\n\n\nMACO APP · NB\n\n\nMSB (Strom / Gas)\n\n\n1. Geschäftsdatenanfrage\nAS4 · PI 17126\n\nCreate transaction\nCreate process data\n\n2. Antwort\nAS4 · PI 19101, 44060 · E_3004\nE_3004 — Geschäftsdatenanfrage zu Stammdaten prüfen\n\nUpdate transaction\nUpdate process data\n"} titel="NB" /> ## Process steps ### Business data request
**Check identifiers** - [17126](/en/schnittstellen/202610/pruefi/ORDERS/PI_17126) — Request master data metering location (gas) · AS4
**Flow**
  1. Message from **MSB (electricity / gas)** · AS4
  2. **Load data for the incoming check** - [Read metering location](/en/api/202610/backend-lesen/getmeterlocationbasic#messlokation-lesen) `GET /getMeterLocationBasic` Try it
  3. **Write endpoint** - Transaction created — [Create process data](/en/api/202610/backend-schreiben-nb/createprocessdata#prozessdaten-erstellen) `POST /createProcessData` Try it out Creates a new transaction in the backend with the data of the incoming message.
  4. **Decision tree** - `17126` → [E_3004](/en/referenz/202610/ebd/E_3004) — Check business data request for master data
  5. **Trigger follow-up process** - [19101](/en/schnittstellen/202610/pruefi/ORDRSP/PI_19101) — Rejection of the request master data - [44060](/en/schnittstellen/202610/pruefi/UTILMD_GAS/PI_44060) — Response to the business data request After processing, the MACO APP starts the follow-up process itself; which of them runs depends on the result of the processing.
### Response
**Check identifiers** - [19101](/en/schnittstellen/202610/pruefi/ORDRSP/PI_19101) — Rejection of the request master data · AS4 - [44060](/en/schnittstellen/202610/pruefi/UTILMD_GAS/PI_44060) — Response to the business data request · AS4
**Flow**
  1. **Triggered by incoming message** - [17126](/en/schnittstellen/202610/pruefi/ORDERS/PI_17126) — Request master data metering location (gas) The MACO APP sends this message itself, as a follow-up process after this incoming message.
  2. **Load data for processing** - [Read metering location](/en/api/202610/backend-lesen/getmeterlocationbasic#messlokation-lesen) `GET /getMeterLocationBasic` Try it - [Read metering point operation contract](/en/api/202610/backend-lesen/getmeasuringpointoperationcontractbasic#messstellenbetriebsvertrag-lesen) `GET /getMeasuringPointOperationContractBasic` Try it - [Read meter](/en/api/202610/backend-lesen/getcounterbasic#zahler-lesen) `GET /getCounterBasic` Try it
  3. Message to **MSB (electricity / gas)** · AS4
    **Response per decision tree** - `19101` → [E_3004](/en/referenz/202610/ebd/E_3004) · NB · Check business data request for master data
  4. **Write endpoint** - Transaction updated — [Update process data](/en/api/202610/backend-schreiben-nb/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend once the message has been created.
Decision trees of this process | EBD | Name | |---|---| | [E_3004](/referenz/202610/ebd/E_3004) | Check business data request for master data |
## Process information
  1. ### First message **MSB (electricity / gas)** sends “Business data request” (step 1). From this point on, the party on this page is next to act.
## Other views of the process The same process through the eyes of the other parties involved: the same steps, each read from their point of view. - [View MSB](/en/prozessdoku/202610/MSB/geli-gas-2-0-geschaftsdatenanfrage-vom-msb-an-nb) — MSB *The source provides no use case profile for this process — objective, precondition and result are not recorded there.* *The steps are the **possible** messages of this process, not a sequence — the source lists neither conditions nor alternatives. The small box on the step names the own view on the left: with **←** it receives, with **→** it sends. Collapsed steps run between other market partners.* :::caution{title="Step sequence reconstructed"} For this process, the BNetzA consolidated version carries no sequence diagram. The steps are reconstructed from the BDEW check identifier table: grouped by the designation, ordered by the process step. The method agrees with the consolidated version in 200 of 200 cases that can be cross-checked — the individual line is nevertheless not editorially reviewed. Check it against the rulebook before adopting it into an implementation specification. :::