Architecture

System Overview

The following diagram illustrates the complete architecture of Form Lab and how its components interact:

Component Repositories

Form Lab integrates several open-source projects:

• Smart Forms - SDC Forms renderer and manager
• SMART Launcher - SMART on FHIR application launcher
• HAPI FHIR Server - Open source FHIR server implementation

Component Details

HAPI FHIR Server

• Serves as the Clinical Data Repository (CDR)
• Stores patient data and clinical information
• Connected to PostgreSQL for persistence

Smart Launcher

• Provides SMART on FHIR launch capabilities
• Creates trust context between apps and data store
• Acts as a proxy to add SMART capabilities

Smart Forms

• SDC Forms renderer and manager
• Connects to both FHIR servers (CDR and Forms)
• Handles form layouts and collected data

Data Flow

1. Initial setup loads sample data into HAPI FHIR
2. Smart Launcher establishes connection context
3. Smart Forms retrieves and submits data through FHIR APIs
4. All services communicate via RESTful FHIR interfaces