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The following rules are used throughout this specification to describe basic parsing constructs. The US-ASCII coded character set is defined by [RFC20]
比较通用的互联网字符标准，以US-ASCII码为基础，可以作为协议制定过程中编码规则的资料使用 OCTET = <any 8-bit sequence of data> CHAR = <any US-ASCII character (octets 0 - 127)> UPALPHA = <any US-ASCII uppercase letter "A".."Z"> LOALPHA = <any US-ASCII lowercase letter "a".."z"> ALPHA = UPALPHA / LOALPHA DIGIT = <any US-ASCII digit "0".."9"> CTL = <any US-ASCII control character (octets 0 - 31) and DEL (127)> CR = <US-ASCII CR, carriage return (13)> LF = <US-ASCII LF, linefeed (10)> SP = <US-ASCII SP, space (32)> HT = <US-ASCII HT, horizontal-tab (9)> <"> = <US-ASCII double-quote mark (34)> CRLF = CR LF LWS = [CRLF] 1*( SP / HT ) TEXT = <any OCTET except CTLs, but including LWS> COMMA = <US-ASCII comma (44)> |
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