Abstract
This chapter reviews the possibilities of WMI query language (WQL). Windows management instrumentation (WMI) query language (WQL) is one of the key elements required to work with WMI. In most cases, WQL is a primary input to execute WMI tasks. The difficulty in learning WQL is that one has to work with some WMI elements. However, because WMI is a mix of various features interacting with each other, it is necessary to start from somewhere. With WMI, the learning phase starts at the level of the common information model (CIM) repository with WQL. Learning the CIM object model is necessary in order to understand the kind of information available from a WMI system. Learning WQL is essential to be able to formulate inputs to gather data from the CIM repository. When working with WMI event scripting, WQL is the primary input to formulate event queries.
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