Foreword
1 Scope
2 References
   2.1 Related Documents
3 Definitions
4 Overview
   4.1 Message Types Supported
   4.2 The Protocol Stack
   4.3 Physical Modulation
   4.4 The Network Layer
   4.5 Data Tokens and Stream
   4.6 The Examples Used in this Document
5 Background Concepts
   5.1 Stream Schemas - How the information streams
        work
   5.2 Tokens and Tables - The Theory of Data
        Compression Used
   5.3 Tiles and Grids - Efficient Representations of
        Latitude and Longitude Values
   5.4 Traffic Models - Shared Models of Link Impedance
        Modeling
   5.5 Forward Pointers - Indirection to Other Data
        Sources
   5.6 Frame Bit Stuffing - Unused 'Flea Bits' in the
        Message Frame
   5.7 Frame Headers - The Concept of Context
   5.8 Transit Scheduling - Unified Concepts of Multi
        Scheduling Tables
6 Network/Directory Messages