JSON Data Definition Format (JDDF)

Document Type Replaced Internet-Draft (individual)
Author Ulysse Carion 
Last updated 2020-01-26 (latest revision 2020-01-23)
Replaced by RFC 8927
Stream ISE
Intended RFC status Experimental
Expired & archived
pdf htmlized (tools) htmlized bibtex
Stream ISE state Replaced
Awaiting Reviews
Consensus Boilerplate Unknown
Document shepherd Adrian Farrel
IESG IESG state Replaced by draft-ucarion-json-type-definition
Telechat date
Responsible AD (None)
Send notices to Adrian Farrel <rfc-ise@rfc-editor.org>

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document proposes a format, called JSON Data Definition Format (JDDF), for describing the shape of JavaScript Object Notation (JSON) messages. Its main goals are to enable code generation from schemas as well as portable validation with standardized error indicators. To this end, JDDF is strategically limited to be no more expressive than the type systems of mainstream programming languages. This strategic limitation, as well as the decision to make JDDF schemas be JSON documents, also makes tooling atop of JDDF easier to build. This document does not have IETF consensus and is presented here to facilitate experimentation with the concept of JDDF.


Ulysse Carion (ulysse@segment.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)