Chapter 3: Using Basic WMI Queries 71
Understanding Schema Queries
You can use WQL to query for elements in the schema. Do not confuse the word schema as it
is used here with the Microsoft Active Directory Schema. The word schema can also be used to
describe the layout of the WMI classes and namespaces and their relationship to one another.
Making schema queries has several benefits. Schema queries are an excellent source of infor-
mation about WMI. In some fashion, you can liken a schema query to a query of SYStables in
Microsoft SQL Server. You use WMI to find out about the technology. In another light, you can
simply think of a schema query like any other WMI query—you ask WMI a question, and it
responds with an answer. If you discover ...