Getting Started with FHIR-FLI 
Welcome to the Getting Started guide for FHIR-FLI. This guide will walk you through setting up and using the FHIR-FLI Dart libraries in your projects.
What is FHIR-FLI?#
FHIR-FLI (Fast Healthcare Interoperability Resources - with Flutter Library Integration) is a set of Dart libraries that enable Flutter developers to easily work with FHIR data. These libraries provide common functionality that is needed for working with FHIR, including serialization/deserialization, making RESTful requests, SMART on FHIR authentication authentication, local secure storage, FHIRPath, FHIR Bulk Data, FHIR Mapping, CQL, and resource validation.
FHIR Version Support#
All packages are available for FHIR R4, R5, and R6. The APIs are identical across versions - just swap the package name:
| Package | R4 | R5 | R6 |
|---|---|---|---|
| Core types | fhir_r4 |
fhir_r5 |
fhir_r6 |
| REST client | fhir_r4_at_rest |
fhir_r5_at_rest |
fhir_r6_at_rest |
| Auth (SMART) | fhir_r4_auth |
fhir_r5_auth |
fhir_r6_auth |
| Bulk data | fhir_r4_bulk |
fhir_r5_bulk |
fhir_r6_bulk |
| CQL | fhir_r4_cql |
fhir_r5_cql |
fhir_r6_cql |
| Database | fhir_r4_db |
fhir_r5_db |
fhir_r6_db |
| Mapping | fhir_r4_mapping |
fhir_r5_mapping |
fhir_r6_mapping |
| FHIRPath | fhir_r4_path |
fhir_r5_path |
fhir_r6_path |
| Validation | fhir_r4_validation |
fhir_r5_validation |
fhir_r6_validation |
The documentation focuses on R4 examples, but all code works identically with R5 and R6 by changing the import.