Hello rakesh,
During F1 help, you often encounter structures rather than transparent tables. What is the difference? Tables are used to store the data permanently. But structures store data at runtime, i.e., during the execution of related tcodes. That's why you do not have any provision to view the data through tcode s SE11/SE16. Whereas all the transaction data (Notification, Orders, Measuring documents, Equipment, Measuring points) all stored in Tables, data of which you can see through these tcodes.
This subject can not be explained easily through these threads. This calls for a habit of studying through F1 of fields you come across, and by > double clicking on the Data element of the pop-up > then clicking on the Where-used icon on the resulting screen. Then you can see all the tables where this Data element is used. Data-element is often the connecting technical name for the same fields with different names.
Sometimes this also does not match. During such times, we need to see in which field of the standard table (say IMRG) my given value in the field of CNTRC (IK11) is stored. Then you will be able to used this field for the extraction of these values to your programs. (We need to do such exercises in Dev server to know the connections between screen(structure) fields and the table fields.
Also the attached table information will help you to have a general outlook about the relation between PM tables.
Good luck
KJogeswaraRao