Final answer:
The correct place to start specifying data requirements in a new software system is with the input and output flows on the use case diagram.
Step-by-step explanation:
The correct place to start specifying data requirements in a new software system is with the input and output flows on the use case diagram.
A use case diagram represents the interactions between the system and its users, depicting the different use cases and their inputs and outputs.
By analyzing the input and output flows on the use case diagram, you can determine the data requirements of the system.