When text expression representation is selected in the preferences, each expression panel contains a text string that is the expression.
The definition for the text form of expressions is:
Function = FunctionName [ '[' Properties ']' ] '(' Argument ',' Argument ',' ... ')' Properties = ( [ PropertyName '=' ] '"' PropertyValue '"' ',' ... ) Argument = Function | ElementRef | ElementRef = ( 'in$:' | 'out$:' | 'elem$:' | 'inv$:' ) ElementName PropertyName = Name of the property of the function. PropertyValue = Value of the property of the function. ElementName = Path name of map/structure element. Example: /Transaction-856/BEG/BEG01 FunctionName = Name of built-in function, or full path name of user function.
If there is a single property for a function, the PropertyName can be omitted.
For element references, in references an input map element, out references an output map element, and elem references a structure element (used in a validation expression associated with a structure). inv represents a reference to a map element that is not present (this can appear due to structure changes after a map has been defined).
If the function refers to a built-in function, only the name of the function need be specified, for example: Concat. However, if a user function is specified, the fully qualified name, including the directory name of the function, must be specified. For example: /userDir/userFunc1.
Concat(in$:/a/b) - Calls the Copy function with the map element /a/b on the input of the map.
Equal(in$:/a/b,Constant["14"]) - Calls the Equal function with two arguments. The first is element /a/b on the input of the map, and the second is the Constant function with a (value) property of 14. This returns true if the value of input map element a/b is equal to 14.