| Name | Description | Type | Package | Framework |
| ActionDependencyRule | A RequirementRule which links the CmdLineOption to the CmdLineAction via the CmdLineAction's name and also specifies | Class | org.apache.oodt.cas.cli.option.require | Apache OODT |
| RequirementRule | A CmdLineOption requirement rule which specifies if it is required, optional, or not required at all. | Interface | org.apache.oodt.cas.cli.option.require | Apache OODT |
| RequirementRule .Relation | Class | org.apache.oodt.cas.cli.option.require | Apache OODT | |