Contents of this chapter:
20.1. SAMPLE
20.2. SAMPLE-POINT
20.3. SAMPLE-RATE
20.4. SAMPLE-REF
20.5. SAMPLE-SPEC
20.6. SAMPLES
20.7. SCHEDULE
20.8. SCHEMATIC-ELEMENT
20.9. SCHEMATIC-ELEMENTS
20.10. SEGMENT
20.11. SEGMENT-END-NODES
20.12. SEGMENT-LENGTH
20.13. SEGMENTATION-DESC
20.14. SEGMENTATION-SPEC
20.15. SEGMENTS
20.16. SENDER
20.17. SENDERS
20.18. SHORT-NAME
20.19. SI-UNIT
20.20. SJW