SEDRIS Attribute Codes (SAC)
Departed from DIGEST approach
- Larger name-space (four characters instead of three)
- Addition of shallow organization (e.g., grouped by “type” - wind)
- Leverages/extends DIGEST lexicographic ordering
- Explicit separation of semantics from representation
- Units (e.g., SI), Datatype, Range, Increment, Number of Characters
Non-hierarchical: 4 character encoding (2-3 alpha, 1-2 numeric)
- Codes generally based on mnemonic abbreviations, e.g.:
- BFC_ Building Function Category
“Type or purpose of the building.”
- HGT_ Height Above Surface Level
“Distance measured from the lowest point of the base at ground or water level (downhill side/downstream side) to the tallest point of the feature.”
- STGJ Surface Trafficability Group (JSIMS Mobility Model)
“The index used ... to describe the trafficability of a terrain unit with respect to ground forces. …”