is a standard form of instruction in the Genstat language requesting a particular action or analysis. All Genstat directives have the same syntax.
Directive name
is a system word used to request a particular action or analysis from Genstat. Directive names may be abbreviated to four characters; if characters 5-8 are given, they must match the standard form, e.g. TREATMENTSTRUCTURE can be written as TREA, TREAT, TREATM, and so on, but not as TREATS. (Also see procedure.)