Simple Conditions

               { GREATER THAN             }
               { >                        }
               { LESS THAN                }
               { <                        }
value IS [NOT] { EQUAL TO                 } value
               { =                        }
               { <>                       }
               { GREATER THAN OR EQUAL TO }
               { >=                       }
               { LESS THAN OR EQUAL TO    }
               { <=                       }

variable IS [NOT] {NUMERIC         }
                  {ALPHABETIC      }
                  {ALPHABETIC-UPPER}
                  {ALPHABETIC-LOWER}
                  {class-name      }

expression IS [NOT] {POSITIVE}
                    {NEGATIVE}
                    {ZERO    }

level-88-condition-name