Functions for Variables & Rules

String Expressions

String Expressions can be used for variables of type “Expression” and as parameters for some rule predicates and actions.
String Expressions may be one of the following:

• variable references, e.g., $someVar
• plain string, e.g., "ABC"
• function calls, e.g., subString($someVar, "BB")
• string with embedded expressions, "AA$someVar"

In some cases it is required to surround an embedded expression with curly brackets to get parsed properly, e.g. "{$someVar}BB". This way, it is also possible to embed function calls, e.g., "AA{subString($someText, "BB")}"

String Functions

• date()
• hexString()
• subString()

Numeric Expressions

Numeric Expressions can be used for variables of type "Expression", and as parameters to functions, rule predicates & actions. Similar to String Expressions it may contain of the following:

• variable references, e.g., $someVar, where the variable contains a number or a number string
• plain string representing a number, e.g., "3"
• numbers, e.g., 3
• function calls which return numbers or number strings, e.g., abs($someVar)
• number strings with embedded expressions, "3$someVar"

Numeric Functions

• abs()