| title = Rule
| name = RULE
| internalname = RuleSystemObjects.RULE
| namespace = System.Rule
| image = [[File:SY_RULE.png|220px]]
| purpose = Configure rules
| version = 2+
| typestring = UBIK.Kernel.MetaClass
| runtimetype = UBIK.Kernel.NameCreatorRule
}}
A rule object is a content object that can be applied to a [[MetapropertyMetaProperty|MetaProperty]] on a [[MetaclassMetaClass|MetaClass]], in order to restrict the possible values of user input at a derived [[BasepropertyBaseProperty|BaseProperty]] of a [[ContentclassContentClass|ContentClass]].
[[Category:Metaclasses]]