Code List - The values of this attribute are taken from a list of codes

Example: data might have a variable named 'site' with values 'A', 'B', and 'C', and the code list would explain how to interpret those codes.

Particular Text - This text is constrained to a pattern or regular expression

Example: '[0-9]{3}-[0-9]{3}-[0-9]{4}' allows for only numeric digits in the pattern of a US phone number.

Anything - Any text is allowed