16.txt">RFC 2616</a>
 </p>
 <h>2.2 Basic Rules</h>
 <p>
  The following rules are used throughout this specification to describe basic parsing constructs. 
  The US-ASCII coded character set is defined by ANSI X3.4-1986.
 </p>
 <pre>
     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 | LOALP