RFC 7405 · PROPOSED STANDARD · 2014
WED · 29 JUL 2026
Case-Sensitive String Support in ABNF
Overview
RFC 7405, “Case-Sensitive String Support in ABNF”, is a Proposed Standard document published in December 2014 by P. Kyzivat. It updates RFC 5234. The canonical text is published by the RFC Editor.
Abstract
This document extends the base definition of ABNF (Augmented Backus-Naur Form) to include a way to specify US-ASCII string literals that are matched in a case-sensitive manner.
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 7405 is hosted at rfc-editor.org. Available in TXT,HTML.
Relationships to other RFCs
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