Here we would like to draw your attention to M808 transaction code in SAP. As we know it is being used in the SAP MM-IV (Invoice Verification in MM) component which is coming under MM module (Material Management).M808 is a transaction code used for Message Schema (Inv. Verification) in SAP.
It comes under the package MR0C.
Transaction M808 technical data table
|Purpose||Message Schema (Inv. Verification)|