Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 System structure
Annex A (informative) - Attributes
Annex B (informative) - Connections of FBS,
SBS and PBS (Example)
Annex C (informative) - Rules to define the
system level
Annex D (informative) - Rules to create system
names
Bibliography