# Business data request from the LF to the NB — LF view ## Process flow from the perspective of the LF \nSystem diagram: Geschäftsdatenanfrage vom LF an NB — view of LF\n\n\nCustomer backend system\n\nMACO APP · LF\n\nMarket partner\n\n\n\nProcess trigger received\n\n3 alternative events\n\nAPI\n\n1. Geschäftsdatenanfrage\n\n\nNB\n\nAS4\n17101, 17102\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\n2. Antwort\n\n\nNB\n\nAS4\n44035, 19101, 19102…\n\nLoad data for the incoming\ncheck\n\n\n3 read APIs called\n\nAPI\nlisted at the step\n\nAPERAK check: Z33,\nMSCONS, Z10, Z18, Z27\n\n\nCreate transaction\n\n\nCreate process data\n\nAPI\nPI 13008, 13009, 13002\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\nPI 44035, 19101, 19102\n"} gesamt={"\nSequence diagram: Geschäftsdatenanfrage vom LF an NB — view of LF\n\n\nBackend (customer)\n\n\nMACO APP · LF\n\n\nNB\n\n\n3 alternative events\nTrigger event\n\n1. Geschäftsdatenanfrage\nAS4 · PI 17101, 17102\n\nUpdate transaction\nUpdate process data\n\n2. Antwort\nAS4 · PI 44035, 19101, 19102… · E_3003\nE_3003 — Geschäftsdatenanfrage zu Stammdaten prüfen\n\nCreate transaction\nCreate process data · PI 13008, 13009, 13002\n\nUpdate transaction\nUpdate process data · PI 44035, 19101, 19102\n"} titel="LF" /> ## Process steps ### Business data request
**Check identifiers** - [17101](/en/schnittstellen/202604/pruefi/ORDERS/PI_17101) — Request master data market location (gas) · AS4 - [17102](/en/schnittstellen/202604/pruefi/ORDERS/PI_17102) — Request for values · AS4
**Flow**
  1. **Process trigger** - [`START_ANFRAGE_MESSWERTE`](/en/api/202604/ausloeser-lf/start-anfrage-messwerte) \",\n \"lokationsId\": \"\"\n }\n ],\n \"AUFTRAG\": [\n {\n \"positionsdaten\": [\n \"\"\n ]\n }\n ]\n },\n \"transaktionsdaten\": {\n \"absender\": {\n \"rollencodenummer\": \"\"\n },\n \"empfaenger\": {\n \"rollencodenummer\": \"\"\n },\n \"kategorie\": \"\",\n \"sparte\": \"\"\n },\n \"zusatzdaten\": {\n \"eventname\": \"START_ANFRAGE_MESSWERTE\",\n \"prozessId\": \"\"\n }\n}"} security={[{"bearer": []}]}>Ausprobieren - [`START_ANFRAGE_STAMMDATEN_MALO`](/en/api/202604/ausloeser-lf/start-anfrage-stammdaten-malo) \"\n }\n ],\n \"AUFTRAG\": [\n {\n \"positionsdaten\": [\n \"\"\n ]\n }\n ],\n \"ENERGIELIEFERVERTRAG\": [\n {\n \"vertragspartner2\": [\n \"\"\n ]\n }\n ],\n \"MARKTLOKATION\": [\n {\n \"lokationsadresse\": {\n \"hausnummer\": \"\",\n \"landescode\": \"\",\n \"ort\": \"\",\n \"ortsteil\": \"\",\n \"postfach\": \"\",\n \"postleitzahl\": \"\",\n \"strasse\": \"\",\n \"zusatzInformation\": \"\"\n }\n }\n ],\n \"ZAEHLER\": [\n {\n \"geraete\": [\n \"\"\n ]\n }\n ]\n },\n \"transaktionsdaten\": {\n \"absender\": {\n \"rollencodenummer\": \"\"\n },\n \"empfaenger\": {\n \"rollencodenummer\": \"\"\n },\n \"kategorie\": \"\",\n \"sparte\": \"\"\n },\n \"zusatzdaten\": {\n \"eventname\": \"START_ANFRAGE_STAMMDATEN_MALO\",\n \"prozessId\": \"\"\n }\n}"} security={[{"bearer": []}]}>Ausprobieren - [`START_GESCHAEFTSDATENANFRAGE`](/en/api/202604/ausloeser-lf/start-geschaeftsdatenanfrage) \",\n \"lokationsId\": \"\"\n }\n ],\n \"AUFTRAG\": [\n {\n \"positionsdaten\": [\n \"\"\n ]\n }\n ]\n },\n \"transaktionsdaten\": {\n \"absender\": {\n \"rollencodenummer\": \"\"\n },\n \"empfaenger\": {\n \"rollencodenummer\": \"\"\n },\n \"kategorie\": \"\",\n \"sparte\": \"\"\n },\n \"zusatzdaten\": {\n \"eventname\": \"START_GESCHAEFTSDATENANFRAGE\",\n \"prozessId\": \"\"\n }\n}"} security={[{"bearer": []}]}>Ausprobieren The backend triggers this step with one of these events.
  2. Message to **NB** · AS4
  3. **Write endpoint** - Transaction updated — [Update process data](/en/api/202604/backend-schreiben-lf/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend once the message has been created.
### Response
**Check identifiers** - [44035](/en/schnittstellen/202604/pruefi/UTILMD_GAS/PI_44035) — Response to the business data request · AS4 - [19101](/en/schnittstellen/202604/pruefi/ORDRSP/PI_19101) — Rejection of the request master data · AS4 - [19102](/en/schnittstellen/202604/pruefi/ORDRSP/PI_19102) — Rejection of the request values · AS4 - [13008](/en/schnittstellen/202604/pruefi/MSCONS/PI_13008) — Load curve (gas) · AS4 - [13009](/en/schnittstellen/202604/pruefi/MSCONS/PI_13009) — Energy quantity (gas) · AS4 - [13002](/en/schnittstellen/202604/pruefi/MSCONS/PI_13002) — Meter reading (gas) · AS4
**Flow**
  1. Message from **NB** · AS4
    **Response per decision tree** - `19101`, `19102` → [E_3003](/en/referenz/202604/ebd/E_3003) · Check business data request for master data
  2. **Load data for the incoming check** - [Read market location](/en/api/202604/backend-lesen/getmarketlocationbasic#marktlokation-lesen) `GET /getMarketLocationBasic` Try it - [Read metering location](/en/api/202604/backend-lesen/getmeterlocationbasic#messlokation-lesen) `GET /getMeterLocationBasic` Try it - [Read meter](/en/api/202604/backend-lesen/getcounterbasic#zahler-lesen) `GET /getCounterBasic` Try it
  3. **APERAK checks** - `19101`, `19102`, `13009` → `Z33` — APERAK check: Is referenced message known ? - `13008`, `13002` → `MSCONS` - `13009` → `Z10` — APERAK check: Is location known ? - `13009` → `Z18` - `13009` → `Z27`
  4. **Write endpoint** - `13008`, `13009`, `13002` → Transaction created — [Create process data](/en/api/202604/backend-schreiben-lf/createprocessdata#prozessdaten-erstellen) `POST /createProcessData` Try it out Creates a new transaction in the backend with the data of the incoming message.
  5. **Write endpoint** - `44035`, `19101`, `19102` → Transaction updated — [Update process data](/en/api/202604/backend-schreiben-lf/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend with the data of the incoming message.
Decision trees of this process | EBD | Name | |---|---| | [E_3003](/referenz/202604/ebd/E_3003) | Check business data request for master data |
## Process information
  1. ### First message The party involved on this page is itself the sender of: „Business data request“ to **NB** (step 1).
## 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 NB](/en/prozessdoku/202604/NB/geli-gas-2-0-geschaftsdatenanfrage-vom-lf-an-nb) — NB *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. ::: The connector table lists no write call for these steps. Derived from the process flow: the own role was already involved in this process, so the transaction already exists. Applies to: [2](#schritt-2)