Defining Attributes of Matchcode Objects 
Procedure
Additional Information
The following additional information is displayed in the screen Maintain Matchcode Object (Attributes):
Secondary tables
Tables linked to the primary table by foreign keys.
Matchcode pools
The name automatically defined for the table pool (see
Pooled and Cluster Tables) belonging to the matchcode object is displayed after you activate the first physically stored ID (see Update Types) of the matchcode object.The table pool is automatically defined in the ABAP Dictionary and in the database when the first physically stored ID of the matchcode object is activated. The name of the table pool contains the prefix M_ and the name of the matchcode object. The name of the table pool for the matchcode object TEST would be for example M_TEST.
Next Action when Creating a Matchcode:
Select the secondary tables of matchcode objects