Unary Tests

Unary-Tests can be used only for input entries of a decision table. They are a special kind of expression with additional operators. The operators get the value of the input expression implicitly as the first argument.

The result of the expression must be either true or false.

An unary-tests expression is true if one of the following conditions is fulfilled:

Comparison

Compare the input value to x.

operator symbol example
equal to (none) "valid"
less than < < 10
less than or equal <= <= 10
greater than > > 10
greater than or equal >= >= 10

Interval

Test if the input value is within the interval x and y.

An interval can be open (x..y) / ]x..y[ or closed [x..y]. If the interval is open then the value is not included.

(2..5)
// input > 2 and input < 5

[2..5]
// input >= 2 and input <= 5

(2..5]
// input > 2 and input <= 5

Disjunction

Test if at least of the expressions is true.

2, 3, 4
// input = 2 or input = 3 or input = 4

< 10, > 50
// input < 10 or input > 50

Negation

Test if the expression is false.

not("valid")
// input != "valid"

not(2, 3)             
// input != 2 and input != 3 

Expression

It is also possible to use a boolean expression instead of an operator. For example, invoking a built-in function.

The input value can be accessed by the special variable ?.

ends with(?, "@camunda.com")
// test if the input value (string) ends with "@camunda.com"

list contains(?, "invalid")
// test if the input value (list) contains "invalid"