Contents of this chapter:
21.1. SPANSPEC
21.2. STATE
21.3. STATE-1
21.4. STD
21.5. SUB
21.6. SUBTITLE
21.7. SUP
21.8. SW-ASAP-6-PRM-METHOD
21.9. SW-BASE-TYPE
21.10. SW-COMPU-GENERIC-MATH
21.11. SW-COMPU-METHOD
21.12. SW-COMPU-METHOD-REF
21.13. SW-COMPU-METHOD-TABLE
21.14. SW-COMPU-METHOD-TEXT
21.15. SW-COMPU-METHOD-TEXT-PAIR
21.16. SW-COMPU-METHOD-VALUE-PAIR
21.17. SW-COMPU-METHODS
21.18. SW-LIMITS
21.19. SW-UNIT
21.20. SW-UNIT-DISPLAY