rule.

audit2allow (1)      - generate policy allow rules from logs of denied operations
defoma-subst (1)     - Modify a rulefile of Defoma font substitution system.
Defoma::Subst (3pm)  - Defoma module to handle Subst cache/rule.
pbmlife (1)          - apply Conway's rules of Life to a portable bitmap
Tk::form (3pm)       - Geometry manager based on attachment rules
Tk::Xrm (3pm)        - X Resource/Defaults/Options routines that obey the rules.
WWW::RobotRules (3pm) - database of robots.txt-derived permissions
WWW::RobotRules::AnyDBM_File (3pm) - Persistent RobotRules