Скачать или смотреть What is Validation on save in Behavior Definition ? | Part 1 | RESTful ABAP Programming Model (RAP)

Validations helps us to check the consistency of the Business Object instance data based on trigger conditions
Trigger conditions would be either create, update, delete operations or any BO columns

This is the first part of video where we are discussing about what is validations and how to add validations at the header level (task level) with an short demo

If you would like to know about EML and its various types, kindly check here
READ & READ BY ASSOCIATION EML -
   • EML - Entity Manipulation Language | RESTf...  
CREATE & CREATE BY ASSOCIATION EML -
   • RAP EML - Create & Create By Association I...  
   • Create & Create By Association Demo | ABAP...  
UPDATE EML -    • What is Update EML & How it works ? - Rest...  
Delete EML -    • What is Delete EML and How it works ? - RE...