Following are three examples of Essential SRS. The IEEE guideline 830 discussed in Chapter 6 Section 5 is the foundation for the SRS.
This section should contain a brief description of what the software system will do. It is intended as an introduction and should be informal and concise.
This section should describe the operational parameters of the software product. It should contain information (if applicable to the product) such as:
Functional requirements (this part could be done with use cases)
Nonfunctional requirements such as performance and other constraints
User-interface specification ...