Merge pull request #162 from fiskaltrust/user/tsc/ftPosSystemId-de

Added ftPosSystemId to German appendix

doc/appendix-de-kassensichv/data-structures/data-structures.md

@@ -18,7 +18,9 @@ Fields from the receipt request that need special handling for the German market
 | `cbTerminalID` | `string (50)` | Mandatory | The unique identification of the input station/cash register/terminal within a ftCashBoxID| 1.3 |
 | `cbUser` | `string (50)` | Mandatory | Name (not ID) of the user who creates the receipt. | 1.3 |
 | `cbReceiptReference` | `string (50)` | Mandatory if the request is part of a business action | Used to connect all requests referring to the same business action. | 1.3 |
-| `cbPreviousReceiptReference` | `string (50)` | Optional | Points to `cbReceiptReference` of a previous request. Used to connect requests representing a business action. E.g. split, merge or reference a receipt to be voided. | 1.3 |
+| `ftPosSystemId` | `GUID / string (36)` | Mandatory | This field identifies and documents the type and software version of the PosSystem sending the request. It is used to identify the used PosSystem and add it to the DSFinV-K. The PosSystem itself has to be created in the Portal and its ID can be implemented as a constant value by the PosCreator. | 1.3 |
+| `cbPreviousReceiptReference` | `string` | Optional | Points to `cbReceiptReference` of a previous request. Used to connect requests representing a business action. E.g. split, merge or reference a receipt to be voided. | 1.3 |
+
 
 Examples of using `cbReceiptReference` and `cbPreviousReceiptReference` to connect requests representing a business action can be found in our Postman collection.