| R |
subclass of Relation |
| F |
subclass of Function |
| P |
subclass of Predicate |
| A |
subclass of Attribute |
| r |
child of Relation |
| f |
child of Function |
| p |
child of Predicate |
| a |
child of Attribute |
| l |
logical operator |
| q |
quantifier |
| y |
function |
| m |
math function |
| ~ |
comparison operator |
| c |
is subclass c in some (subclass c C) formula |
| C |
is superclass C in some (subclass c C) formula |
| i |
is instance i in some (instance i c) formula |
| s |
is subrelation s in some (subrelation s S) formula |
| S |
is superrelation S in some (subrelation s S) formula |
| @ |
is relation operator in formula |