The type of each requirement is listed in the second column to the left in
Appendix E. Let us have a look at each of the requirement types.
Notice that one does not create requirements ex nihilo, rather they are based
on business principles (as indicated in the rationales of the requirements in
Appendix E. Also, the IoT-A Unified Requirements (see Appendix B and [IoT-
A UNIs]) can be consulted for generating requirements for a concrete
architecture (see Section 5.2.8).