An enumerated integer that indicates that the referenced SettingData represents the last requested values for attributes ...

An enumerated integer that indicates that the referenced SettingData represents the last requested values for attributes of the Managed Element or that this information is unknown. 
Attributes of the SettingData itself indicate whether it represents the last configuration applied to the ManagedElement or is a transient snapshot of the requested settings. Current operational characteristics of a ManagedElement should be represented with properties of the ManagedElement. element or that this information is unknown. 
For a given ManagedElement and all instances of a SettingData subclass, there shall be at most one instance of ElementSettingData which references the ManagedElement and an instance of the SettingData sub-class where there is a specified non-null, non-key property of the SettingData sub-class, and the IsMaximum property on the referencing ElementSettingData instance has a value of \"Is Maximum\" or the IsMinimum property on the referencing ElementSettingData instance has a value of \"Is Minimum\" and the IsCurrent property on the referencing ElementSettingData instance has a value of \"Is Current\". There shall be at most one instance of ElementSettingData which references a ManagedElement and an instance of a SettingData sub-class where the IsCurrent property has a value of \"Is Current\" and the IsMinimum property does not have a value of \"Is Minimum\" and the IsMaximum property does not have a value of \"Is Maximum\".