SAP Object Type

Length

Naming Convention

Applications Log Objects

    Sub-objects

4

10

Zxxx

Zxxxxxxxxx

Area Menu

20

Zaaxxxxxxxxxxxxxxxxx

Batch Input Session

12

Zaapfxxxxxxx

Change Document Object

15

Zxxxxxxxxxxxxxx

Context Object

20

Zaax…x

Correction Numbers

10

sssc9#####

Development Class

30

Zaax….x                                          See Appendix E

Dialog Module

30

Z_aa_x….x

Dialog Module Pool

40

SAPDZaax….x

 Include module names generated by the Workbench:
            DZaax….xTOP   - Data declarations
            DZaax….xO## -           PBO modules
            DZaax….xI##  -           PAI modules
            DZaax….xF##  -           Subroutines

Enhancement Project

40

Zaax….x

Form Module Pool             (subroutines)

40

SAPFZaax….x

Include module names generated by the Workbench::
FZaax….xTOP   -           Data declarations

FZaax….xE##  -           External Subroutine

FZaax….xF##  -           Internal Subroutines       

Function Groups

26

Zaax….x

Function Keys
(GUI Status)

20

xxxxx….x

Function Modules

    30

Z_aa_x….x

Memory ID

    20

ZZx….x                                         

Message Class (aka Message ID)

    20

Zaax….x                                          See Appendix F

Messages Number

    3

nnn

Number Range

    10

Zaaxxxxxxx

Programs, Includes and Reports

40

Zaakx….x

Local private objects: (Note:  Never create Local objects for production usage.)

Ydddx….x

SAP Modifications (copy of SAP program):

Zoooo..oo     

Note: ABAP  Queries must end with _query.  ABAP Queries should not be used in production.  Please see the ABAP Queries section for more information.

Screens

4

nnnn

Screen Module Pool

    (transactions)

40

SAPMZaax….x

Include module names generated by the Workbench::
MZaax….xTOP  -          Data declarations
MZaax….xO## -          PBO modules
MZaax….xI## -          PAI modules
MZaax….xF##  -          Subroutines

Title Bar         

20

Zx….x  

Transaction Code

20

Zaax….x 
Zaa_<tab_name>           Table Contents
                                    display via SE16

Type Pools

5

Zaann

Update Program Module Pool

8

SAPUZaax….x

Include module names generated by the Workbench:
            UZaax….xTOP   -          Data declarations
            UZaax….xO## -           PBO modules
            UZaax….xI##  -           PAI modules
            UZaax….xF##             -           Subroutines           

Variables

30

Variable names should be descriptive and include the following prefixes:

C_                    Constant

K_                    Context Variable

V_                    Variable

P_                    Parameter Field

Rx_                All Local Parameters in a                       
                Subroutine have to use                 the following naming

                convention:
                        x=  S:   Structure
                              T:   Internal table
                              V:   Variable

                NOTE: Variables within                         the subroutine must be                         named with the normal                                     prefixes (C_, K_, V_ etc).

O_             Select-Options Field

R_              Ranges

S_             Structure

T_             Internal tables

T_BDC_            BDC Table

TYPE_         Type Declaration

X_              Control

OBJ_          ABAP Object

In SAP delivered programs e.g. FORM-Userexits, use ‘ZZ_’ as an additional prefix.    

Recommendation:

Variable names can be up to 30 characters long. Use the '_' character to separate words within variable names unless space doesn't allow it.
Use meaningful and be verbose when creating variable names. Always use words to add meaning. Short descriptive names will be accepted.