HDF Schema Reference
The Heimdall Data Format (HDF) defines 7 JSON document types for security assessment data. Each schema is self-contained — all referenced types are embedded, no external fetches needed.
Document Types
📝 HDF Amendments
Waivers, attestations, POA&Ms, and other status overrides applied to findings.
- Version:
v3.1.0 - Schema:
hdf-amendments.schema.json $id:https://mitre.github.io/hdf-libs/schemas/hdf-amendments/v3.1.0
📋 HDF Baseline
Security requirement definitions without results — the "what to check" document.
- Version:
v3.1.0 - Schema:
hdf-baseline.schema.json $id:https://mitre.github.io/hdf-libs/schemas/hdf-baseline/v3.1.0
🔀 HDF Comparison
Differential analysis of two or more assessment results.
- Version:
v3.1.0 - Schema:
hdf-comparison.schema.json $id:https://mitre.github.io/hdf-libs/schemas/hdf-comparison/v3.1.0
📦 HDF Evidence Package
Bundle of references to all HDF documents for a complete assessment record.
- Version:
v3.1.0 - Schema:
hdf-evidence-package.schema.json $id:https://mitre.github.io/hdf-libs/schemas/hdf-evidence-package/v3.1.0
📅 HDF Plan
Assessment plan defining what baselines to run against which components.
- Version:
v3.1.0 - Schema:
hdf-plan.schema.json $id:https://mitre.github.io/hdf-libs/schemas/hdf-plan/v3.1.0
📊 HDF Results
Assessment results from running security checks against a target system.
- Version:
v3.1.0 - Schema:
hdf-results.schema.json $id:https://mitre.github.io/hdf-libs/schemas/hdf-results/v3.1.0
🏗️ HDF System
System authorization boundary, components, data flows, and control designations.
- Version:
v3.1.0 - Schema:
hdf-system.schema.json $id:https://mitre.github.io/hdf-libs/schemas/hdf-system/v3.1.0
Downloads
| Schema | Version | Download |
|---|---|---|
| HDF Amendments | v3.1.0 | hdf-amendments.schema.json |
| HDF Baseline | v3.1.0 | hdf-baseline.schema.json |
| HDF Comparison | v3.1.0 | hdf-comparison.schema.json |
| HDF Evidence Package | v3.1.0 | hdf-evidence-package.schema.json |
| HDF Plan | v3.1.0 | hdf-plan.schema.json |
| HDF Results | v3.1.0 | hdf-results.schema.json |
| HDF System | v3.1.0 | hdf-system.schema.json |