Topic nodes are high level nodes with proper names:
Proxy nodes stand in for and do the work of topic-nodes:
| a | abs | acos | addition | and | asin | atan | ave | ave-nz |
| c | calculated data link | ceil | compare | cos | cosh | crisp argument |
| d | data link proxy | deg2rad | division |
| e | e | equation | error | exp |
| f | false | floor | fuzzy argument | fuzzy curve |
| g | goal | goal group | goal group proxy | goal proxy |
| i | if |
| k | k |
| l | ln | log |
| m | max | min | mod | multiplication |
| n | not |
| o | or |
| p | pi | pow |
| r | rad2deg |
| s | simple data link | sin | sinh | sor | sqrt | subtraction-negation | switch |
| t | tan | tanh | true |
| u | undetermined | union |
| x | xor | xy-pair |