There are two types of action: Visibility and Accessibility Accessibility type Action There are two types of rules: Permission and Prohibition Prohibition subclassOf Rule There are two types of rules: Permission and Prohibition Permission subClassOf Rule There are two types of action: Visibility and Accessibility Visibility type Action A rule has an action Rule hasAction Action There are two types of target: Friends, Eveyone or None None type RuleTarget There are two types of target: Friends, Eveyone or None All type RuleTarget There are two types of target: Friends, Eveyone or None Friends type RuleTarget A rule can have a target Rule hasRuleTarget RuleTarget A policy contains rules Policy definesRule Rule An asset can have a policy Item hasPolicy Policy