Indefinite article that can be optionally used or not used in source text and player commands. Within text substitutions, it will result in the thing that follows being described with its indefinite article.
A phrase that invokes a specific rule and decides on the value it returns.
see if absent.
An event in the story world caused by a character, such as examining, taking, or waiting.
A set of three rulebooks (check, carry out, and report) defined for every action and specifying its default behavior.
A set of three rulebooks (before, instead, and after) empty by default, which can specify exceptional behavior for an action or group of actions.