The Mask field types are basically a convenient combination of the TCA column types. If certain criteria meet, a
field will be assigned to a Mask field type. The criteria are specific TCA settings, which define the type of the
field. For example the TCA type
input can have many appearances. With
renderType => 'inputLink' set, the field
transforms into a link field. Mask will assign it to the field type
Link then. This is how core fields are displayed
as the appropriate field type.