.Open The Syntax and Semantics of Mathematical Expressions . History The original research for this language was carried out in late Victorian times by the Rev'd Charles Dodgson in his paper on the design for a new mathematics building in Oxford University, England. . Syntax expression::= $top $middle $bottom. top::=":" | ";" | "8". middle::="-". bottom::="(" | "|" | ")". . Example .As_is :-) . Semantics The $top indicates if the writer is normal, winking, or wearing glasses, respectively. The $bottom indicates the emotional state of the writer - the "(" indicating sadness and displeasure, where as the ":-)" indicates joke. . Note Strings like .As_is (-: indicate that the writer is either dyslexic or standing on their head. .Close