A collection of class definitions that describe managed objects in a specific environment.

security descriptor

A data structure that contains the security information for a securable object, such as a share, file, sink, or event filter.

security identifier (SID)

A data structure that identifies user, group, and computer accounts.

semi synchronous

See semisynchronous method.


See semisynchronous method.

semisynchronous method

A method call that returns immediately and enables the application or script to enumerate the returned objects as a collection.

Service SID

A unique SID that is created for each security context; that is, one for "LocalService" and one for "NetworkService". Only the service SID has permissions to resources, like threads and events, which are created by the WMI Provider Host Process (wmiprvse.exe).


See security identifier.

singleton class

A WMI class that supports a single instance.


A COM object that acts as the physical delivery destination for the results of an asynchronous operation or an event notification. A sink implemented by a permanent consumer supports the IWbemUnboundObjectSink interface. A sink implemented by a temporary consumer or applications making asynchronous calls supports the IWbemObjectSink interface.

Scripting clients can use the SWbemSink object and events, such as OnObjectReady, to receive callbacks resulting from asynchronous calls.

standard consumer

A preinstalled permanent consumers that performs an action, such as sending an email message or writing to a log when configured by a Managed Object Format (MOF) file or a script.

standard provider

A provider that is built into WMI, which is different from a third-party or custom provider.

standard qualifier

A qualifier that the CIM Object Manager automatically attaches to a class, instance, property, method, or parameter of a method.

standard schema

A common conceptual framework that organizes and relates the classes that represent the current operational state of a system, network, or application. The Distributed Management Task Force (DMTF) defines the standard schema in the Common Information Model (CIM).

static class

A CIM class definition that rarely changes, and is stored in the CIM repository until it is explicitly deleted. The CIM Object Manager can provide a definition of a static class without a provider. A static class can support either static or dynamic instances.

static instance

An instance of a CIM class that is persistently stored in the CIM repository and remains valid until explicitly deleted, even across system restarts.

static method

A method defined in a CIM class that is executed by retrieving the class definition instead of retrieving an instance of the class.


A part of a schema that is owned by a specific organization. The Win32schema is an example of a subschema.

system class

A class that the CIM Object Manager defines to support core features such as event notification, security, and localization. A system class is automatically defined in each namespace. A system class derives from the abstract base class __SystemClass.

System Monitor

A utility that is the GUI for Performance Monitoring.

system property

A property that the CIM Object Manager defines to provide information that applies to each class, for example, name, derivation, and namespace.