## Validator Changes
* New Feature: Validating references: parameters -check-references and -resolution-context
* New Feature: Use AI Service to validate CodeableConcept.text (very experimental)
* Add AI validation tests as a command line option ([-aiTests](https://chat.fhir.org/#narrow/channel/323443-Artificial-Intelligence.2FMachine-Learning-.28AI.2FML.29/topic/LocalAI))
* Don't enforce code system property references to standard properties in R4 (R4 hack workaround)
* Correctly handle supplements when validating based on expansions
* Fix issues with version dependent resolution of correct server for implicit value sets
* Better handle failure to find imported value sets when expanding
* correct error handling for expansion failure
* Correct grammar in language about resource not being valid against a profile
* use IPS 2.0.0 for `-ips`, not an old copy
* Fix NPE generating snapshots with expansions
* Rework `-txTests` to support additional test files and improve R4/R5 logging
* Fix bugs in RulesDrivenPolicyAdvisor
* Accept property in CodeSystem without requiring it be backed by a code
* Add issue when extension is deprecated
## Other code changes
* Track & report expansion source when rendering ValueSet expansions
* Render ValueSet supplement dependencies
* Add server headers to fhir-settings.json
* find places where ManagedFileAccess was missed
* Fix Actor rendering in obligations tables
* Renderer: move xml-no-order to tools ig
* Resource Factory: support for range in sheet for instance generation (#1881)
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## Validator Changes
* Do not create issue about draft dependency for example bindings
* Beef up validation of CodeSystem properties that are codes
* Make sure all validation messages have a message id
* Validator enforce version-set-specific value for Extension and Extension context
* Specific Error when ValueSet.compose.include.system refers to a ValueSet
* Fix NPE processing code system supplements
## Other code changes
* Report count of tests in output from TxTester
* resolve issues with references between IGs to example resources
* Lookup compliesWithProfile target from link-only dependencies
* Update SNOMED editions related routines (add more editions)
* Accessibility - role=presentation on appropriate tables
* Add support for ADL in packages
* Support for Archetype processing in IG publisher
* Lazy load binaries for reduced memory usage
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## Validator Changes
* Validate that ConceptMap references to ValueSets are actual value sets
* Check if abstract classes have concrete subtypes in scope
* Handle tx ecosystem failure properly
* fix for CLI Should Fail with Non-Zero Exit Code on TX Test Errors
## Other code changes
* Add support for multiple lines in the first cell in heirarchical tables
* Also add support for suppressing lines and inner borders
* Add support for table.rows in TestDataFactory
* Add Element View for non-technical readers of profiles
* Improved Rendering for Timing Datatype
* Fix for handling SD extensions when generating snapshots
* Don't remove bindings from types with characteristics = can-bind (Extensions in R5)
* Various minor Fixes for generating snapshots for archetypes (checking type parameters)
* Fix logback configs + update logback (#1868)
* .qos.logback-logback-core-1.5.13: Fix inclusion of logback-test in jar and fix classpath log configs
* Fix LoggingPolicy enum (use SLF4J)
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## Validator Changes
* Christmas 2025 Add new command option to validator: [test instance factory](https://confluence.hl7.org/display/FHIR/Using+the+FHIR+Validator#UsingtheFHIRValidator-GeneratingTestInstancesusingFactories)
* Fix validation of invariants in profiles - check for more conflicts, and don't call conflict if the expression is the same
* Fix issues with tracking supplement usage and getting supplement version matching correct
* Fix npe loading old simplifier package
## Other code changes
* Fix handling of ValueSetVersion parameter in txTests
* Test Instance Generation, and many fixes to PE model
* Fix logical model rendering to use type characteristics for can-be-target
* Only use profiled datatype information for generating snapshots for Resource and Extension
* Fix comparison template loading issue
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## 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)
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## Validator Changes
* Add support for valueset-version
* Add support for terminology extraction
* Add support for expansion parameters when validating
* fix NPE in validator around Extension context
* Handle secondary terminology server errors properly
* Fix questionnaire response status checking
* Add versions to message about multiple matching profiles
* hide API-Key from appearing on the tx log
* Add supplements for used systems as well as for value set systems when validating on server
* fix missing port from server when doing tx-registry redirections
* Fix problem not finding current version of extensions pack for non-R5 versions
* Fix validation of displays when language is unknown
* fix issue missing idrefs validating IPS documents
* Update FHIRPath validation to handle rootResource type properly
* Fix obscure error on contentReference in profiles in FHIRPath engine
* Fix version conversion issue for validating derived questionnaires
## Other code changes
* New release of pubpack
* Fix r4b liquid tests
* Refactor Liquid engine and add support for forLoop and capture
* Add support for liquid on csv files
* Add support for using Liquid on plain JSON directly and add support for markdownify filter
* Many improvements to Profile Code Generation
* Start working on using new IG infrastructure for Tx tests
* Questionnaire rendering improvements
* Merge Functionality for CapabilityStatement.import
* Do not use metadata from data type profiles on elements when generating snapshots
* Fix presentation issues and union and intersection links in previous version comparison
* Fix filter comparison logic when comparing valuesets
* Fix version issues in snapshot generation tests
* Eliminate id from snapshot generation test case comparison
* Change rules around stripping extensions when generating snapshots
* fix bug using wrong reference on uri in liquid renderer
* add translations for expansion errors
* fix issue with comparison template missing
* Apply null pointer check to all switch(Enumeration) statements in version conversion code
* Remove mysql dependency
* Fix bug in DecimalType on null Bigdecimal ()] all versions)
* Fix bad URL in inter-version extension conversion of ValueSet for ValueSet property
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* Fix weird double if
* Add test for null doc status and preserving extension
* Add fix for null enum DocumentReference30_40
* Use java null instead of Enumeration.NULL for Enumeration src.setValue
* Apply null pointer check to all switch(Enumeration) statements
## Validator Changes
* fix value set validation on import validation to find external value sets
* Fix terminology tester for change to language header
* Adjust wording of R5 slicing check
* Sort entries in error message about profiles to make the order reproducible
## Security Issues
* Automate testing for XMLUtils factory methods
## Other code changes
* update language files and add french
* make HTA messages translatable
* new release - pubpack
* NPE fixes
* suppress Json resourceType property in some logical models
* Fix missing isModifierReason on modifier extensions
* fix bug converting NamingSystem.url between versions
* Fix IG dependsOn.reason conversion
* fix code generation for enums
* Whitespace formatting and support for complex extensions
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## Validator Changes
* Suppress error in v6.1.0 of THO
* Fix NPE for Ontoserver tests?
* make HL7 WG validation rule publication dependent
* Fix for illegal names in profiles when code generating
* Handle search syntax in value set filter
## Other code changes
* Apply noTerminologyTests inside terminology resource validation
* Add support for validator session for internal cache management
* Support ViewDefinition as a custom resource
* refactor UserData names to use constants and expose user data through ResourceWrapper
* Add GEM path to fhir-settings.json for Jekyll on some systems
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## Validator Changes
* Support authentication for terminology servers (see https://confluence.hl7.org/display/FHIR/Using+fhir-settings.json)
* Fix issue where valdiator not retaining extension context when checking constraint expressions in profiles
* Validate min-length when found in extension
* Correct bug parsing json-property-key values with meant validation failed
* Fix problem validating json-property-key value pairs
* Fix special case r5 loading of terminology to fix validation error on ExampleScenario
* Improve handling of JSON format errors
* Fix bug where extension slices defined in other profiles are not found when processing slices based on extension
* Validate fhirpath expression in slice discriminators
* Fix slicing by type and profile to allow multiple options per slice
* List measure choices when a match by version can't be found
* Check server metadata when executing terminology test cases
## Other code changes
* More work on code generation for profiles
* Render min-length extension on profiles
* Clone SQL on FHIR engine to R4, and update FHIRPath engine based on R5 current code
* Update SQL on FHIR engine to allow push as well as pull
* Change R5 tx server to use http://tx.fhir.org/r5 (instead of /r4)
* Update output from tx-tester to include release ready statement
* Fix rendering of Logical Models for polymorphic elements, and rendering target profiles with versions
* Render contained resources in List resource
* #1790 - Fix versionFromCanonical returns system instead and systemFromCanonical returns version
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