WBEM

Web-Based Enterprise Management (WBEM) is a set of management and Internet standard technologies developed to simplify and standardize management of enterprise computing environments. WBEM leverages emerging Web technologies in order to deliver the standard. The DMTF has developed a core set of standards that make up WBEM, which includes

• A data model, the Common Information Model (CIM) standard
• An encoding specification, xmlCIM Encoding Specification
• A transport mechanism, CIM Operations over HTTP
  

The CIM specification is the language and methodology for describing management data. The CIM schema includes models for all components and resources in an IT infrastructure including Systems, Applications, Networks (LAN) and Devices. The CIM schema will enable applications from different developers on different platforms to describe management data in a standard format so that it can be shared among a variety of management applications. It also allows for a standard way to extend the schema to accommodate vendor specific extensions.

The xmlCIM Encoding Specification defines XML elements, written in Document Type Definition (DTD), which can be used to represent CIM classes and instances.

The CIM Operations over HTTP specification defines a mapping of CIM operations onto HTTP that allows implementations of CIM to interoperate in an open, standardized manner and completes the technologies that support WBEM.

For details on the standard refer to www.dmtf.org.

WMI

Windows Management Instrumentation (WMI) is Microsoft's version of WMI. It is an infrastructure to support the CIM model and Microsoft-specific extensions of CIM. It offers a powerful set of services, including query-based information retrieval and event notification. Data is input into the CIM-based repository via Providers (conceptually similar to SNMP Agents). Data is accessed via a COM/DCOM API:

The WMI infrastructure ships in Windows 98, Microsoft Windows NT® 4.0 SP4, Windows 2000, and Windows XP. It also is supported on Windows 95. It runs as the "Windows Management" Service.

The main difference between the WBEM standard and that of WMI is the transport mechanism. WBEM uses XMLcim over HTTP and WMI uses COM/DCOM.

WBEM/WMI/Bluefin development services

ProdexNet has developed extensive expertise in developing WBEM and WMI based technologies:

• Providers
• Applications
• CIMOM

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