A policy feature installed on the SharePoint server farm.
Assembly: Microsoft.Office.Policy (in Microsoft.Office.Policy.dll)
A policy feature is an assembly or other piece of code that provides some content management functionality to Microsoft SharePoint Server 2010, and possibly to client application documents as well.
Each policy feature must implement the IPolicyFeature interface.
For more information about policy features, including additional requirements, see Policy Feature Overview.
Policy features are scoped at the farm level, as opposed to policies, which are scoped at the site collection level. Logically, each policy is a collection of instruction sets for one or more policy features. For each policy feature that you want to include in a policy, you include an instruction set, called a policy item, in the policy. A policy item contains the settings for only one policy feature.
For more information about information policies in general, see Introduction to Information Management Policy.