{HEAD ~ The interface device} includes {TAIL ~ a field} that stores an output knowledge variable, input and local fields that store knowledge variables for operating the output knowledge variables, and a field that stores a computing equation of declarative representation that utilizes knowledge variables using operands as other knowledge variables 
{ HEAD ~ The interface device } includes { TAIL ~ a field } that stores an output knowledge variable , input and local fields that store knowledge variables for operating the output knowledge variables , and a field that stores a computing equation of declarative representation that utilizes knowledge variables using operands as other knowledge variables
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH