This case-sensitive code system http://hl7.org/fhir/uv/sdc/CodeSystem/launchContext defines the following codes:

Code	Display	Definition
patient	Patient	Patient in context at launch time (FHIR Patient resource)
encounter	Encounter	Encounter context at launch time (FHIR Encounter resource)
location	Location	Location context at launch time (FHIR Location resource)
user	User	User in context at launch time (FHIR Device, PractitionerRole, Practitioner, RelatedPerson, Organization or Patient resource)
study	ResearchStudy	ResearchStudy in context at launch time (FHIR ResearchStudy resource)