I created a similar work for a project once. One thing I would suggest is optional (min,max) parameters. What they would do would depend on the context.

For int, float, other numbers, it could be used to make sure they are within a given range.

For date types that the time is within a given period.

For text that the length is within the allowed limits.

Also I would add TEXT and ALPHANUMERIC /^\w-+$/ to your type list.

-Lee

"To be civilized is to deny one's nature."