1 Scope
2 References
3 Definitions
3.1 Terms defined
elsewhere
3.2 Terms defined in this
Recommendation
4 Abbreviations and acronyms
5 Conventions
6 Functional requirements
6.1 Requirements framework
6.2 Business level
requirements
6.3 Specification level
requirements
7 Analysis
7.1 Scope
7.2 Use cases
7.3 Interface definition
7.4 Information object
classes
Appendix I – ITU-T example of trouble type
I.1 Trouble type