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We've yet again released a big improvement to the Simplifier platform last week with Simplifier 2025.5. It includes the basis for Single Sign-On, brings improved FHIR validation and many more improvements! As always, please reach out if you have any questions.

Single Sign-On

We're implementing Single Sign-On as an optional add-on for Enterprise customers. If your organization is interested in this, please reach out and let us know if your Identity Provider prefers SAML and/or OpenID Connect.

Validation

The new Firely .NET SDK Validator is now the default validator all over Simplifier. This will lead to more issues caught and better error messages. We also catch and expose issues with your FHIR resources better and in many more places.

If you temporarily want to switch back to the old Firely .NET Validator you can do so. In the Validator Playground you can use the drop-down to select the validator to use. In Quality Control you can choose your validator with the new optional flavor parameter on the validate action or the assert action, with the following values:

  • netsdk → Legacy SDK .NET validator
  • firely → Firely .NET Validator (default)

For example, this rule will validate all the FHIR resources in your project with the Legacy SDK .NET validator:

- category: resource
  action: validate
  flavor: netsdk

Resolve URL now has best guess parameter

The Resolve URL tool is a great solution for making your canonical URLs resolvable in the browser. However, previously you had to provide us with a scope, so Simplifier knew in what package of project context you wanted to find the canonical.

Now you can provide the best=true parameter and Simplifier will redirect the visitor to the best hit for a canonical. For example:

Improvements to the project editor

The online resource editor for FHIR has received multiple updates, including the option to delete files directly from the interface.

Smaller features

  • The Christmas theme is back on the homepage (only visible on larger screens)!
  • Your editable version of the Implementation Guide somehow got disconnected from your series of published guides? You can now connect them again without needing the help of support.
  • The Implementation Guide editor now has validation of all your Table of Content (toc.yaml) files. This will highlight which pages and folders in your guide are not listed (and will thus not appear in the menu) and which files and folders are listed but don't actually exist.
  • When a user is invited to your project, but hasn't accepted yet, you can now see with what role you have invited them.
  • Rendering of translations within resources are back

Other comments

  • Users of the Obligation extension will see errors about non-existing data types. This is actually an issue with the FHIR Specification and has been reported.
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