NIST - Guide for Mapping Types of Information and Information Systems to Security Categories

This guideline is less prescriptive for mission-based information than for administrative and support information because there is significantly less commonality of mission information types among agencies than is the case for administrative and support information. Types of information can normally be divided into information associated with administrative activities common to most agencies and information associated with an agency’s mission-specific activities. In this guideline, administrative, management, and support information is referred to as management and support information. While specific administrative and support information types are identified in this guideline, the treatment of mission-based information focuses on general guidelines for identification of information types and assignment of impact levels.

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