Standard No.:	GB/T 18304-2001
English Name:	Information technology--Chinese specification of internet character transfer format for email
Chinese Name:	信息技术 因特网中文规范 电子邮件传送格式
Chinese Classification:	L67    Computer application
Professional Classification:	GB    National Standard
ICS Classification:	35.240.20 35.240.20    IT applications in office work 35.240.20
Source Content Issued by:	State Quality and Technology Supervision Bureau
Issued on:	2001-01-02
Implemented on:	2001-8-1
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	10000 words
Translation Price(USD):	250.0
Delivery:	via email in 1 business day

1 Scope This standard specifies message transfer format for Chinese character and characters in other languages in internet email. This standard is applicable to internet email system and associated application fields. 2 Normative References The following normative documents contain provisions which, through reference in this standard, constitute provisions of this standard. At time of publication, the editions indicated were valid. All standards are subject to revision, and all parties coming to an agreement according to this standard are encouraged to study whether the latest editions of the normative documents are applicable. GB/T 1988-1998 Information Technology—7-bit Coded Character Set for Information Interchange (eqv ISO 646: 1991) GB 2312-1980 Code of Chinese Graphic Character Set for Information Interchange; Primary Set GB 13000.1-1993 Information Technology—Universal Multiple-Octet Coded Character Set (UCS)—Part 1: Architecture and Basic Multilingual Plane (idt ISO/IEC 10646-1:1993) GB/T 15273.1-1994 Information Processing—Octets Single-byte Coded Graphic Character Sets—Part 1: Latin Alphabet No.1 (idt ISO 8859-1:1987) RFC 821 Simple Mail Transfer Protocol RFC 822 Standard for the Format of ARPA Internet Text Messages RFC 2045 Multipurpose Internet Mail Extensions Part 1 RFC 2046 Multipurpose Internet Mail Extensions Part 2 RFC 2047 Multipurpose Internet Mail Extensions Part 3 RFC 2048 Multipurpose Internet Mail Extensions Part 4 RFC 2049 Multipurpose Internet Mail Extensions Part 5 RFC 1641 Unicode (Using Unicode with MIME 3 Definitions For the purposes of this standard, the following definitions apply. 3.1 plain text text consisting of character, line feed character and form feed character, which does not provide or allow control functions like formatting command, font attribute indication, processing instruction, interpretive instruction or content editing

Foreword i 1 Scope 2 Normative References 3 Definitions 4 General Requirements Annex A (Informative) UTF-7 and UTF Annex B (Informative) Base-64 Character Annex C (Informative) List of Unicode-related charset Assignment Annex D (Informative) Reference Implementation Model