6 The
   3 Schema
   2 SpaceSystem
   1 –
   1 and
   1 Text
   1 Terms
   1 TelemetryMetaData
   1 Symbols
   1 Specification
   1 ServiceSet
   1 Scope
   1 Root
   1 References
   1 Record
   1 Object
   1 Normative
   1 Introduction
   1 Information
   1 Header
   1 Definitions
   1 Defaults
   1 Conformance
   1 CommandMetaData
   1 Additional
   1 Acknowledgements