A bit too hairy (= irreducibly triadic)
for your average reductionist, but see:  (01)
 http://mywikibiz.com/Semeiotic
http://knol.google.com/k/jon-awbrey/semeiotic/3fkwvf69kridz/
http://mywikibiz.com/Directory:Jon_Awbrey/Papers/Semiotic_Information  (02)
 http://mywikibiz.com/Sign_relation
http://planetmath.org/encyclopedia/SignRelation.html  (03)
Jon Awbrey  (04)
--  (05)
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