This case-sensitive code system http://hl7.org/fhir/us/ph-library/CodeSystem/us-ph-codesystem-usage-context defines the following codes:
| Code | Display | Definition |
| emergent | Emergent | The artifact is an emergent reporting specification program release. |
| program | Program | The artifact is a reporting specification program. |
| routine | Routine | The artifact is a routine reporting specification program release. |
| supplemental | Supplemental | The artifact is applicable only when determining whether an event is suspected reportable. |
| triggering | Triggering | The artifact is applicable when identifying a triggering event. |
| value-set-library | ValueSet Library | The artifact is a ValueSet Library. |