CCategorical

Data type	Result
Long	The return value contains a single category whose value is Val.
Text	The function parses the string as a comma-separated list of either category values or names. Category values must be of the form "{1,2,0}", and the return value contains each listed value, in the order given. Category names must be of the form "{married,single,widowed,other}", which the function will convert to a list of category values. You can omit the braces if the value to be converted is a single category value or name. Val cannot consist of a category expression. The conversion of category names to values is possible only when the case data is opened with an MDM document, or when a script has an open MDM document available to it. For more information about opening a MDM document in a script, see Value resolution.
Categorical	Val is returned unchanged.
Double, Date, or Boolean	An error occurs.
Object	If the object has a default property, the value of that property is converted. Otherwise an error occurs.
NULL value	If Val is NULL, the return value is an empty Categorical value ({}).