STRUCTURE OF IDOC IN SAP ABAP.

STRUCTURE OF IDOC IN SAP ABAP. 

Every Idoc contains three types of records.

Control Record (EDIDC)

Data Records (EDIDD)

3.   Status Records (EDIDS)

CONTROL RECORD:- It is like address on the post card which gives the information about sender, receiver and type of data the idoc is holding. It will be always single record.

DATA RECORDS:- The actual data that is to be transferred is contained by data records. It can be single or multiple records. Actually the data records internally contain the segments and segments contain fields and fields contain values.

STATUS RECORDS:- It specifies about the actual position of the idoc. As idoc travels different mile stones system gives different statuses. Using the status of the idoc we can find out the position of the idoc.

1 to 49 statuses are used for out bound idoc

50 to 99 statuses are used for inbound idoc.

Important statuses are.

---    outbound idoc just created

30  ---    ALE settings are ok

03  ---    Idoc reached port

50  ---    Inbound Idoc just created

51  ---    Error in posting the document into data base

53  ---    Document successfully posted in to data base

There are 2 types of Idocs.

Master Idoc

Communication Idoc

MASTER IDOC: - The data that is to be transferred is fetched from data base and formatted into Idoc format. This Idoc is called master Idoc. This Idoc is not stored in data base. This Idoc is not transferred. Its life span is until communication Idocs are created.

COMMUNICATION IDOCS:- The recipient specific Idocs are called communication Idocs. These Idocs are stored in data base. These Idocs are moved from source system to destination system. 

MESSAGE TYPE:- This specifies about the type of data the Idoc is holding. The standard message types are 

1. MATMAS         Material master data

2. CREMAS          Vendor master data

3.  DEBMAS         Customer master data

PORT:- it specifies about how the data should be transferred from source system to destination system. Transaction code for Port creation is WE21.Two important ports are..

T-RFC Port (Transactional RFC Port)

File Port

In T-RFC port the data will be moved in the form of memory buffers. In file port the data will be transferred in the form of files.

REMOTE FUNCTION CALL (RFC):-  It is used to define the character of communication link between two system where the remote enabled function module is intended to be executed. In ALE this RFC will be used to connect to the remote system.

Transaction for RFC is SM59.

For generation of Idocs SAP has given standard T-codes based on the type of data you are going to transfer. The important T-codes are.

1. BD10      Material master push

2. BD11      Material master pull

3. BD12      Customer master push

4. BD13      Customer master pull

5. BD14       Vendor master push

6. BD15       Vendor master pull   

  You have to either run push or pull T-code. No need to run both the programs. If you want to send the data from source system run push T-code. If you want to get the data from destination system run pull T-code.