# Transmission of price sheet NB to LF — NB view ## Process flow from the perspective of the NB \nSystem diagram: Übermittlung Preisblatt NB an LF — view of NB\n\n\nCustomer backend system\n\nMACO APP · NB\n\nMarket partner\n\n\n\nProcess trigger received\n\nSTART_PREISBLATT\n\nAPI\n\n1. Preisblatt\n\n\nLF\n\nAS4\n27003\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n"} gesamt={"\nSequence diagram: Übermittlung Preisblatt NB an LF — view of NB\n\n\nBackend (customer)\n\n\nMACO APP · NB\n\n\nLF\n\n\nSTART_PREISBLATT\nTrigger event\n\n1. Preisblatt\nAS4 · PI 27003\n\nUpdate transaction\nUpdate process data\n"} titel="NB" /> ## Process steps ### Price sheet
**Check identifiers** - [27003](/en/schnittstellen/202604/pruefi/PRICAT/PI_27003) — Price sheets for NB services · AS4
**Flow**
  1. **Prozessauslöser** [`START_PREISBLATT`](/en/api/202604/ausloeser-nb/start-preisblatt) \"\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_PREISBLATT\",\n \"prozessId\": \"\"\n }\n}"} security={[{"bearer": []}]}>Ausprobieren The backend triggers this step with this event.
  2. Message to **LF** · AS4
  3. **Write endpoint** - Transaction updated — [Update process data](/en/api/202604/backend-schreiben-nb/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend once the message has been created.
## Process information
  1. ### First message The party involved on this page is itself the sender of: „Price sheet“ to **LF** (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 LF](/en/prozessdoku/202604/LF/awh-sperrprozesse-gas-ubermittlung-preisblatt-nb-an-lf) — LF *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. :::