English: Detailed scheme of the UTF-8 encoding. Includes bits numbering and exact position of every bit. This scheme doesn't contain any localized labels (suitable for international use).
Warning: this describes an old non-standard extension to support code points using up to 31-bit, all encodable to at most 6 bytes (such extension is no longer valid since the publication of ISO/IEC 10646:2003, The Unicode Standard 4.0, and the current RFC 3629 in the IETF Standard Tracks, that are restricting valid code points to the first 17 planes using at most 21 bits, all encodable into at most 4 bytes with more restricted valid values). Old applications depending on the older definitions by ISO/IEC 106464-1 or older RFCs, and still needing such extension to encode more planes, must not label this usage with "UTF-8", but may use "FSS-UTF" (which also has a distinct ASN OID).