A Data Set defines the relationship between a parent field and a base field, while describing the type of data each field is intended to support. A parent field and a base field can only have one data set type, giving the fields a one-to-one relationship. For example, the primary account owner, Owner1, is a CLIENT data set type and can use the base fields that are also of CLIENT data set type (e.g. first name, date of birth, etc).
The following Data Sets are used in version 2.0 of the Quik! Field Definition:
...