Here we would like to draw your attention to SKPR04 transaction code in SAP. As we know it is being used in the SAP BC-SRV (Basis Services / Communication Interfaces in Basis) component which is coming under BC module (BASIS).SKPR04 is a transaction code used for Maintaining Physical Document Class in SAP.
It comes under the package SDOK.
Transaction SKPR04 technical data table
| Tcode | SKPR04 |
| Purpose | Maintaining Physical Document Class |
| Module | BC |
| Component | BC-SRV |
| SAP Package | SDOK |
| Type | P |