SMS_G_System_ExtHistory Server WMI Class

 

Updated: November 1, 2013

Applies To: System Center 2012 Configuration Manager, System Center 2012 Configuration Manager SP1, System Center 2012 R2 Configuration Manager

The SMS_G_System_ExtHistory Windows Management Instrumentation (WMI) class is an SMS Provider server class, in System Center 2012 R2 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.

GroupID

Data type: UInt32

Access type: Read-only

Qualifiers: [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.

ResourceID

Data type: UInt32 

Access type: Read/Write

Qualifiers: [key]

See SMS_G_System Server WMI Class.

RevisionID

Data type: UInt32 

Access type: Read-only

Qualifiers: [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.

TimeStamp

Data type: DateTime 

Access type: Read-only

Qualifiers: None

Date 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.

SELECT * FROM SMS_GEH_System_Logical_Disk
WHERE ResourceID = <resourceid>
AND Timestamp = "<timestamp>"
Show: