org.hl7.fhir.core/RELEASE_NOTES.md

Validator Changes

• Start removing R2 support- add note that it's not officially supported anymore
• Add support for finding the existence of implicit value sets
• move tx tests to tx-ecosystem IG and change -txTests parameters
• Switch priority order of package servers (packages2.fhir.org is not rate limited)
• Fix issue with value set version conversion on contains.property (Check for both "value" and "value[x]")
• Fix error message validating ConceptMap when size too large

Other code changes

• Security fix: Bump ucum to 1.0.9
• Add XhtmlToMarkdown library
• Add support for THO rendering of NamingSystem information
• Add profile-based sample instance generation (WIP)
• fixes for snapshot generation test debugging
• Add support for languages to npm package and package list
• fix rendering issues - resources with no id, and urn: references shouldn't be links
• fix regex escapes in R5 Constants regex for RESTful references
• Improvements to translation file generation (better path, eliminate duplicates)