CONST

CONST indicates that the value for a parameter type is a constant for every calculation of the attribute.

The formats of the different types of values which are entered are as follows:

Value	Description	Example
NULL	null or empty value	NULL
Boolean	true or false value	True
Integer	a whole number that can be positive, negative, or zero	93
Decimal	number, containing decimal symbol - '.'	93.012
Date	date values used in the 'yyyy-MM-dd' format	2020-12-25
GUID	Global Unique Identifier - used for objects identification	6B29FC40-CA47-1067-B31D-00DD010662DA
String	explicitly denoted string, entered in single quotation marks	'Example text.'
Type	used with CAST for type conversions; the constant is the type to which you want to convert.	System.Int32

Everything else is treated as string!