A Domain type represents a single Data Type that inherits from a Base Type like String, Integer, Float, Date, etc. and can include different properties.
For example, a ZIP Code is an inherited type of string with the property of a maximum of 5 chars length.

To create a new Domain Type click on the “+” button.

Enter a unique Name for the Domain Type and an optional Description.
Also, select a Parenttype to inherit from by clicking on the appropriate field.

In the area below you can set the properties of your Data Type:

Min 

Minimum length of a String, minimum number of a range, earliest date of a date range.

Max

Maximum length of a String, maximum number range, latest date of a date range.

RegEx

Regular expression to validate this Domain Type –  click here for more information.

Possible Values

Simple JSON Array of Strings repesenting literals of chosen Base Type.

Nullable

If activated, this value can be empty (null).