get https://fhir-api.zapehr.com/r4b/ImplementationGuide//_history
ImplementationGuide on the FHIR specification website.
A set of rules of how a particular interoperability or standards problem is solved - typically through the use of FHIR resources. This resource is used to gather all the parts of an implementation guide into a logical whole and to publish a computable definition of all the parts.