Union of http://hl7.org/fhir/tools/CodeSystem/id-expectation and http://hl7.org/fhir/tools/CodeSystem/id-expectation

This is the CodeSystem that contains all the codes in Id Expectation Codes (http://hl7.org/fhir/tools/CodeSystem/id-expectation) and Id Expectation Codes (http://hl7.org/fhir/tools/CodeSystem/id-expectation). E.g. what you have to deal with if you get resources containing codes in either of them

CodeSystem

Generated Narrative: CodeSystem 56460120-6caa-4086-92bc-70a745537ea4-23

This code system http://hl7.org/fhir/comparison/CodeSystem/56460120-6caa-4086-92bc-70a745537ea4-23 defines codes, but no codes are represented here

CodeDefinition
optional Id may or not be present (this is the default for elements but not resources)
required Id is required to be present (this is the default for resources but not elements)
prohibited An ID is not allowed in this context