Organization Firely

NEW! Forge 22.0 for FHIR R4 - Redmond 2019 Edition

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Forge is the official HL7 FHIR Profile & Conformance editor.
Forge 22.0 for R4 is a minor update with some compliance & stability improvements.

Release information

This Forge release supports FHIR R4.

We publish separate Forge releases for FHIR DSTU2, STU3 and R4. Each release only supports a single FHIR version and is updated separately. Different releases can be installed side-by-side on the same machine.

Visit to download the latest versions.


  • .NET Framework
    Forge now requires the .NET Framework 4.7.2 (updated from 4.6).
    The .NET Framework 4.7.2 is fully .NET Standard 2.0 compliant, without any additional dependencies.

    Update to FHIR STU3 .NET API 1.3.0-alpha-20190604-4] (alpha release)

Bug fixes

  • Fix lookup list for Identifier.system and Coding.system When moving focus away after change, the drop-down combobox control no longer clears the property value.

  • Type slicing: do not rename slicing introduction element Forge only renames named slices of a type slice element, constrained to a single type. Forge no longer renames the original type slice element, even if constrained to a single type. Note: In R4, the original ([x]) type slice element may specify constraints on the list of allowed types.

  • Type slicing: do not initialize default discriminator when slicing description is specified When slicing a choice type ([x]) element, Forge will automatically initialize the default discriminator, but only if both the discriminator and the slicing description are empty.

  • Type slicing: fix child extension on named type slice Fix a bug where Forge would mangle the element path of a profile extension element that is a direct child of a type slice constraint with a renamed path, e.g. Observation.effectiveDatetime.extension instead of Observation.effective[x].extension

  • Show Reference type properties also for type Canonical Show the type.targetProfiles, type.aggregation & type.versioning properties when type.code equals Canonical Note: these properties only apply to reference types. Forge hides these properties for non-reference types. FHIR R4 introduces the new Canonical type, representing a reference to a conformance resource based on the canonical url.

  • Exclude core extensions on ElementDefinition from output Special extensions on ElementDefinition as specified on the core resource and type profiles, such as elementdefinition-translatable, are no longer included in the generated output. Note: extensions on ElementDefinition itself are not visible in the user interface. We are considering implementing support for a limited set of well-known core extensions on ElementDefinition and StructureDefinition in a future release.

  • Invalidate extension context after save The Add Extension dialog would not detect updates to the context of an extension definition after saving changes to disk, due to aggressive caching. This has now been fixed. Note: DirectorySource.Refresh() now also invalidates the ArtifactSummary of modified files

  • Allow selection of read-only text You can now select and copy the content of a read-only TextBox control.

  • Package Manager: improved error handling


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Happy profiling, hope to see you at DevDays!

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