RFC 9485 · PROPOSED STANDARD · 2023
SUN · 14 JUN 2026
I-Regexp: An Interoperable Regular Expression Format
Overview
RFC 9485, “I-Regexp: An Interoperable Regular Expression Format”, is a Proposed Standard document published in October 2023 by C. Bormann, T. Bray. The canonical text is published by the RFC Editor.
Abstract
This document specifies I-Regexp, a flavor of regular expression that is limited in scope with the goal of interoperation across many different regular expression libraries.
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.
Read this RFC
The canonical text of RFC 9485 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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