Tags for Identifying Languages
RFC 4646, “Tags for Identifying Languages”, is a Best Current Practice document published in September 2006 by A. Phillips, M. Davis. It obsoletes RFC 3066. It has been obsoleted by RFC 5646 — refer to the newer document for the authoritative version. The canonical text is published by the RFC Editor.
Abstract
This document describes the structure, content, construction, and semantics of language tags for use in cases where it is desirable to indicate the language used in an information object. It also describes how to register values for use in language tags and the creation of user-defined extensions for private interchange. This document, in combination with RFC 4647, replaces RFC 3066, which replaced RFC 1766. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.
What “Best Current Practice” means
Documents the IETF community's recommended operational or procedural practice rather than a protocol specification.
The canonical text of RFC 4646 is hosted at rfc-editor.org. Available in TXT,HTML.
- RFC 4645 Initial Language Subtag Registry
- RFC 4647 Matching of Language Tags
- RFC 4644 Network News Transfer Protocol Extension for Streaming Feeds
- RFC 4648 The Base16, Base32, and Base64 Data Encodings
- RFC 4643 Network News Transfer Protocol Extension for Authentication
- RFC 4649 Dynamic Host Configuration Protocol for IPv6 Relay Agent Remote-ID Option
- RFC 4642 Using Transport Layer Security with Network News Transfer Protocol
- RFC 4650 HMAC-Authenticated Diffie-Hellman for Multimedia Internet KEYing