The SMS_G_System_ExtHistory Windows Management Instrumentation (WMI) class is an SMS Provider server class, in Configuration Manager, that serves as an abstract base class representing operating system extended history for a client computer.

The following syntax is simplified from Managed Object Format (MOF) code and includes all inherited properties.

Class SMS_G_System_ExtHistory : SMS_G_System
	 UInt32 GroupID;
	 UInt32 ResourceID;
	 UInt32 RevisionID;
	 DateTime TimeStamp;


The SMS_G_System_ExtHistory class does not define any methods.



Data type: UInt32Access type: Read-onlyQualifiers: [key]ID of the group that distinguishes one hardware inventory instance from another within one client resource. For example, each logical disk object for a client is assigned a unique GroupID value.

Data type: UInt32 Access type: Read/WriteQualifiers: NoneSee SMS_G_System Server WMI Class.

Data type: UInt32 Access type: Read-onlyQualifiers: [key]ID that increments if the object changes after the last time inventory was taken. The highest number indicates the most recent update. Objects with the same ResourceID and GroupID values are deltas. They differ from one another by the RevisionID number.

Data type: DateTime Access type: Read-onlyQualifiers: NoneDate and time of the inventory.


Your application uses this class to determine the state of a client at any given time. Names of derived extended history classes are prefixed with "SMS_GEH_System_" followed by the inventoried object name. An example class name is SMS_GEH_System_ACCOUNT. Your application can use the derived classes to determine the state of a hardware component on a client at a given point in time.

The SMS Provider determines the state by using the information from classes derived from both SMS_G_System_Current Server WMI Class and SMS_G_System_History Server WMI Class. However, the application cannot query SMS_G_System_ExtHistory to determine the state of all hardware components on a client at a given point in time.

Your query must include the ResourceID and TimeStamp values in the WHERE clause, as shown in the following example.

  Copy Code
SELECT * FROM SMS_GEH_System_Logical_Disk
WHERE ResourceID = <resourceid>
AND Timestamp = "<timestamp>"


Runtime Requirements

Development Requirements

See Also

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