Thenamespace contains classes that represent the SQL Server policy-based management facet objects.
The Microsoft.SqlServer.Management.Dmf namespace.namespace contains classes that support policy-based management objects in the
Facets are a set of logical properties that model the behavior or characteristics of certain types of managed targets.
The number and characteristics of the properties are built into the facet and can be added or removed by only the maker of the facet. For example, Database Mail is a property of the Surface Area Configuration facet that applies to SQL Server 2005 and later versions.