another field that stores {HEAD ~ a computing equation} of {TAIL ~ declarative representation} that utilizes said knowledge variables, using operands as other knowledge variables; and 
of
another field that stores { HEAD ~ a computing equation } of { TAIL ~ declarative representation } that utilizes said knowledge variables , using operands as other knowledge variables ; and
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH