This case-sensitive code system http://hl7.org/fhir/smart-app-launch/CodeSystem/smart-codes defines the following codes:

Code	Display	Definition
launch-app-ehr	Launch application using the SMART EHR launch	The task suggest launching an application using the SMART on FHIR EHR launch.
launch-app-standalone	Launch application using the SMART standalone launch	The task suggest launching an application using the SMART on FHIR standalone launch.
smartonfhir-application	SMART on FHIR application URL.	The URL of a SMART on FHIR application.
smartonfhir-appcontext	Application context related to this launch.	The application context (appContext) to be passed to the application after launch.