RFC 6067 · INFORMATIONAL · 2010
MON · 15 JUN 2026
BCP 47 Extension U
Overview
RFC 6067, “BCP 47 Extension U”, is an Informational document published in December 2010 by M. Davis, A. Phillips, Y. Umaoka. The canonical text is published by the RFC Editor.
Abstract
This document specifies an Extension to BCP 47 that provides subtags that specify language and/or locale-based behavior or refinements to language tags, according to work done by the Unicode Consortium. This document is not an Internet Standards Track specification; it is published for informational purposes.
What “Informational” means
Published for the general information of the community. It does not define an IETF standard and carries no standards-track status.
Read this RFC
The canonical text of RFC 6067 is hosted at rfc-editor.org. Available in TXT,HTML.
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