HL7 Europe Base and Core FHIR IG
2.0.0 - trial-use 150

HL7 Europe Base and Core FHIR IG, published by HL7 Europe. This guide is not an authorized publication; it is the continuous build for version 2.0.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/patrick-werner/base/ and changes regularly. See the Directory of published versions

## Cross-version Analysis

### R4 vs R5 IG

This implementation guide has parallel flavours for HL7 FHIR R4 and R5.

### Cross Version Analysis

This is an R4 IG. None of the features it uses are changed in R4B, so it can be used as is with R4B systems. Packages for both R4 (hl7.fhir.eu.base.r4) and R4B (hl7.fhir.eu.base.r4b) are available.