# Cross-version Analysis - HL7 Europe Base and Core FHIR IG v2.0.0-ballot

* [**Table of Contents**](toc.md)
* **Cross-version Analysis**

## Cross-version Analysis

### R4 vs R5 IG

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

### 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)](package.r4.tgz) and [R4B (hl7.fhir.eu.base.r4b)](package.r4b.tgz) are available.

