The following illustrations show the general usage restrictions for the various types of Vocabulary terms depending on where they are used in a Rulesheet. This table indicates, for example, that entities (terms from the Vocabulary) may be used in any section of the Rulesheet. Rule Operators, however, are restricted to only three sections.

Note: Some operators have specific restrictions that vary from this general table – see each operator's usage restrictions for details of these exceptions.
Figure 1. Vocabulary usage restrictions in Rulesheet sections
Figure 2. Sections of Rulesheet that correlate with usage restrictions