An OsidRule identifies an explicit or implicit rule evaluation. An associated Rule may be available in cases where the behavior of the object can be explicitly modified using a defined rule. In many cases, an OsidObject may define specific methods to manage certain common behavioral aspects and delegate anything above and beyond what has been defined to a rule evaluation.

Rule evaluations may also require extra input data in the form of OsidConditions. getConditionRecordTypes() lists the required OsidRecords. These types may or may not be directly managed as part of this rule definition.