Concise Data Definition Language : Additional Control Operators for the Conversion and Processing of Text
RFC 9741, “Concise Data Definition Language : Additional Control Operators for the Conversion and Processing of Text”, is a Proposed Standard document published in March 2025 by C. Bormann. The canonical text is published by the RFC Editor.
Abstract
The Concise Data Definition Language (CDDL), standardized in RFC 8610, provides "control operators" as its main language extension point. RFCs have added to this extension point in both an application-specific and a more general way.
The present document defines a number of additional generally applicable control operators for text conversion (bytes, integers, printf-style formatting, and JSON) and for an operation on text.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 9741 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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