MI Classes

This section provides WMI class and reference page information.

Naming Conventions for WMI Classes and Properties

Property names must conform to the Managed Object Format (MOF) syntax defined by the Distributed Management Task Force (DMTF). The initial identifier characters must be from the letters a through z and the underscore character (_). All additional characters must be from the letters a through z, the underscore character, and the numerals 0 through 9. For more information, see the Unicode Usage section of the CIM Specification Version 2.2.

SQL reserve words should not be used in class and property names. For a complete list of the SQL reserve words and for more information, see the Guidelines section of the CIM Specification Version 2.2.

Document Conventions for a WMI Class Reference Page

This section identifies and describes the document conventions for a WMI class reference page.

A typical reference page contains a syntax block, methods table, and a properties list.

  • Syntax block

    A simplified version of MOF code that includes the class name, parent class (if any), and class properties, in alphabetical order, with data types.

  • Methods table

    If a class has methods, the methods are listed in the table immediately following the syntax block. Each implemented method is linked to a reference page.

  • Properties list

    Each class property is listed with a data type, access type (read-only or read/write), qualifiers, and a description of the property.

Syntax block

class Win32_xyz : CIM_xyz 
  uint16 abc  ;
  string def  ;

Methods table

Win32_xyz methodsDescription
SomeMethodBrief description of what the method does.


Properties list


Data type: uint16

Access type: Shows whether you have read/write or read-only access to this property.

Qualifiers: If present, shows the qualifiers for the property. For example, KeyOverride.

Describes the property and provides inheritance information for the property. For example, this property is inherited from CIM_xyz. There is a link to the parent class if Microsoft provides an implementation of that class. However, the CIM classes are not available.


Data type: string

Access type: Read-only

Description of the property.


Gives more information about the class, if applicable. Also provides derivation information, if applicable.

Related topics

WMI Reference