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Mnemonic constants function as proxies for numeric values. They can be used in place of numeric input for constant nodes and argument definitions. A single mnemonic constant can be used in an unlimited number of places. Its value is global to the knowledge base.

Values are assigned to mnemonic constants in the data list editor on the “k” tab.

Common uses are:

  • To give self-evident meanings to a constant: MaxSpeed = 55
  • To make it easy to change values globally
  • To make it easy to edit controversial thresholds at the knowledge base level instead of buried where the constants are used.

Mnemonic constants are created simply by typing in a suitable name instead of a numeric value when editing constants or argument definitions.


The value can be any numeric value or NULL (blank - no value).


The value is set in the data list editor.