## Validator Changes
* Validate of experimental property on bindings
* Add -no-experimental-content flag
* Allow JSON named extensions to be structure types other than logical
* Process relative URLs properly in base when generating snapshots
## Other code changes
* Fix rendering path for value set references for kindling
* refactor error handling in ProfileUtilities
* Fix for NPE processing packages
***NO_CI***
## Validator Changes
* Fix expression for con-3 properly (fix validation problem on some condition resources)
* Fix FHIRPath bug using wrong type on simple elements when checking FHIRPath types
* FHIRPath: Allow _ in constant names (per FHIRPath spec)
* Fix value set rendering creating wrong references
* Fix bug processing value set includes / excludes that are just value sets (no system value)
* Alter processing of unknown code systems per discussion at ,https://chat.fhir.org/#narrow/stream/179252-IG-creation/topic/Don't.20error.20when.20you.20can't.20find.20code.20system and implement unknown-codesystems-cause-errors
* Improve message for when elements are out of order in profile differentials
## Other code changes
* fix problem where profile rendering had spurious 'slices for' nodes everywhere
* Update SQL-On-FHIR implementation for latest cases, and clone test cases to general test care repository
* Fix problem generating value set spreadsheets
* fix concurrent modification error processing language translations
* Check for null fetcher processing ConceptMaps (#1728)
***NO_CI***
* Fix bug processing value set includes / excludes that are just value sets (no system value)
* fix value set rendering creating wrong references
* Update SQL-On-FHIR implementation for latest cases, and clone test cases to general test care repository
* Fix expression for con-3 properly (fix validation problem on some condition resources)
* FHIRPath: Allow _ in constant names (per FHIRPath spec)
* Fix FHIRPath bug using wrong type on simple elements when checking FHIRPath types
* release notes
* fix sql-on-fhir tests
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Co-authored-by: Grahame Grieve <grahameg@gmail.ccom>