short for "S-Expression" [http://en.wikipedia.org/wiki/S-expression] (S stands for symbolic).

   The defining RFC: http://theory.lcs.mit.edu/~rivest/sexp.txt
   Rivest's SEXP page: http://theory.lcs.mit.edu/~rivest/sexp.html

[Zarutian] is half in love with the canonical form because of ease of parsing.
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[Category Glossary] | [Category Internet]