The MP in this sample is used in my blog post that could be found here:

http://www.SystemCenterRocks.com/2014/12/create-group-containing-all-computers.html

Basically it is used to show how a Group Population in SCOM can be created to show all Windows Computers hosting a specific (discovered) Application, in that case as example SQL Server DB Engine.

I put some comments right into the XML to explain the changes. More information can be found in the blog post mentioned above.

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