As per this document, you can use service://[SERVICE_NAME]/[IDENTIFIER]to call a service to prepopulate a form and also use "Identifier" to pass more info to the service.
Anybody has more details on what this IDENTIFIER is supposed to look like? Also how do we retrieve it from within the service?
SERVICE_NAME refers to the name of the OSGI prefill service. Refer Create and run a prefill service. IDENTIFIER refers to any metadata required by the OSGI prefill service to fetch the prefill data. An example of meta-data could be an identifier to the logged-in user.
SERVICE_NAME refers to the name of the OSGI prefill service. Refer Create and run a prefill service. IDENTIFIER refers to any metadata required by the OSGI prefill service to fetch the prefill data. An example of meta-data could be an identifier to the logged-in user.