With FQL you can run complex queries over your FHIR meta data. Useful for gaining insight and quality control.
Try Firely Query Language using this project.
Resources shown in this project should be considered unstable and not suited for immediate implementation. Stable versions can be found in the released packages. Implementation guides (IGs) that build on the packages in this project, may be found at informatiestandaarden.nictiz.nl. Each IG explicitly calls out which package version to use. Always consult the implementation guide for the correct package.