Two separate implementation of the IPS proposed a $summary operation for the generation of an IPS Bundle from FHIR servers. These were the New Zealand server (https://terminz.azurewebsites.net/fhir/OperationDefinition/Patient-summary) and a Denmark server (server no longer active but see proposal in pull-request: https://github.com/HL7/fhir-ips/pull/15)

Significant discussion on this operation was had during the IPS weekly calls from October 2021 through January 2022. See https://confluence.hl7.org/display/PC/2021+IPS+Meetings

The addition of this operation also added a new page under "General Principles and Design" that outlines the relation of this operation to alternatives. The work for this operation addition and edits are available in a branch: https://github.com/HL7/fhir-ips/pull/17