IR Design

The Intermediate Representation (IR) is InkGen’s internal model for representing FHIR profiles.

IR Structure

The IR provides:

• Resource Definition - Base resource and applied profile
• Elements - Fields with types, cardinality, and constraints
• Extensions - Custom data elements
• Slices - Discriminated element variants
• Bindings - Value set bindings to coded elements

IR to Code Generation

The IR is designed to be:

• Language-agnostic - Can generate code for any language
• Complete - Contains all information needed for validation
• Efficient - Optimized for traversal and code generation
• Extensible - Can be extended with custom information

Example IR

{
  "name": "MyPatient",
  "parent": "Patient",
  "elements": [
    {
      "path": "name",
      "type": "HumanName",
      "min": 1,
      "max": "*",
      "isMustSupport": true
    },
    {
      "path": "birthDate",
      "type": "date",
      "min": 0,
      "max": 1
    }
  ]
}

See Type System for details on type representation.