I am new to CRM
so i have following doubts till now:
1. what is basically header and item data in CRM .And where can we declare them or if the header and item are ment for transaction then where can we declare them or make them.What is the significance of declaring them individually
2.What is basically Doc flow in CRM and i have read from somewhere that obj_A is used for header type and obj_B is used for item type .But i did not understand it fully how and where can we use them .
plz if you know clearify my doubts.Its urgent