Cited in: RFC 6067
3 RFCs mentioned in the text of RFC 6067 (BCP 47 Extension U)
| RFC | Title | Status | Date |
|---|---|---|---|
| 2119 | Key words for use in RFCs to Indicate Requirement Levels | Best Current Practice | March 1997 |
| 5646 | Tags for Identifying Languages | Best Current Practice | September 2009 |
| 5741 | RFC Streams, Headers, and Boilerplates | Informational | December 2009 |