This case-sensitive code system http://hl7.org/fhir/CodeSystem/usage-context-agreement-scope defines the following codes:
Code
Display
Definition
realm-base
Realm Base
Defines use-case independent foundational expectations for exchange within a particular country or jurisdiction. Should be accompanied by a jurisdiction. Commonly used as a 'base' for more restrictive artifacts.
knowledge
Knowledge
Defines use-case-specific information or guidance that is relevant to a specific business or health domain but is not mandated for particular use.
domain
Domain
Defines use-case-specific requirements for a specific business or health domain. May vary in jurisdictional scope from international to small region and in business scope from broad to narrow.
community
Community
Sets contractual or business expectations for systems participating in a particular exchange community.
system-design
System Design
Documents the specific capabilities of a single system as 'available' for purchase or use. May have some variability reflecting options that can be configured.
system-implementation
System Implementation
Documents the specific points of a single production system or endpoint. This may be time-specific - i.e. reflecting the system 'as it is now' or 'as it was at some point in the past'.