DFDL website screenshot

DFDL

Data Format Description Language (DFDL) is an open standard for describing data formats used in binary and text files and data streams. DFDL is used to describe the format of existing data so that it can be parsed or unparsed (generated) using a DFDL processor, enabling integration with legacy and modern data systems. DFDL was developed by the Open Grid Forum (OGF) and is also published as ISO/IEC 23415:2004. Apache Daffodil is the reference open-source implementation, with the latest release being version 4.1.0.

DFDL is profiled on the APIs.io network. Tagged areas include Apache Daffodil, Binary Data, Data Description, Data Formats, and DFDL.

DFDL’s developer surface includes documentation and 5 more developer resources.

🌐 Visit website 📡 Source on GitHub
8.5/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5
0 APIs
Apache DaffodilBinary DataData DescriptionData FormatsDFDLISO StandardOpen Grid ForumParsingSchemaStandardsXML Schema

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 8.5/100 · minimal
Contract Quality 0.0 / 25
Developer Ergonomics 1.7 / 20
Commercial Clarity 0.0 / 20
Operational Transparency 0.0 / 13
Governance 0.0 / 12
Discoverability 6.8 / 10
Agent readiness — 0/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/dfdl: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Dfdl Domain Security

TLSv1.3 · HSTS

SECURITY

Dfdl Vulnerability Disclosure

security.txt · contact published

SECURITY

Resources

Documentation 2

Reference material describing how the API behaves

Specification
Specification
 Documentation
Documentation

Access & Security 2

Authentication, authorization, and security posture

VulnerabilityDisclosure
VulnerabilityDisclosure
 DomainSecurity
DomainSecurity

Company 1

The organization behind the API

Website
Website

Other 1

Properties that don't map to a standard resource type

ISO Standard
ISO Standard

Source (apis.yml)

apis.yml Raw ↑ 
aid: dfdl
name: DFDL
description: Data Format Description Language (DFDL) is an open standard for describing data formats used in binary and text
  files and data streams. DFDL is used to describe the format of existing data so that it can be parsed or unparsed (generated)
  using a DFDL processor, enabling integration with legacy and modern data systems. DFDL was developed by the Open Grid Forum
  (OGF) and is also published as ISO/IEC 23415:2004. Apache Daffodil is the reference open-source implementation, with the
  latest release being version 4.1.0.
type: Index
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/dfdl.png
tags:
- Apache Daffodil
- Binary Data
- Data Description
- Data Formats
- DFDL
- ISO Standard
- Open Grid Forum
- Parsing
- Schema
- Standards
- XML Schema
url: https://daffodil.apache.org/
created: '2025-01-01'
modified: '2026-04-28'
specificationVersion: '0.19'
apis: []
common:
- type: VulnerabilityDisclosure
  url: security/dfdl-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/dfdl-domain-security.yml
- type: Website
  url: https://daffodil.apache.org/
- type: Specification
  url: https://www.ogf.org/ogf/doku.php/standards/dfdl/dfdl
- type: ISO Standard
  url: https://www.iso.org/standard/87444.html
- type: Documentation
  url: https://daffodil.apache.org/docs/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com