New about files

PowerShell v3 features updateable help.  The help files are not quite complete at the moment but a recent update to the help that is available brought a couple of very useful files:

about_WMI

about_WQL

The first gives a good overview of WMI and the its structure.  Good background reading.

The second gives a very good start for using WMI Query Language – WQL.  It doesn’t cover everything – for instance associations are mentioned but it does give enough to work sensibly with WMI filters.

Both files are recommended reading