Each field object in the form buffer corresponds by name to an HTML form element. Each field object also corresponds to a named variable or database field in the record buffer. (If you do not select a database field, the AppBuilder can define a variable with a name that is similar to the corresponding form element name, or you can define your own variable or buffer and set the field source in the AppBuilder to User.) assignFields moves the current values stored in the form buffer to the corresponding variables and fields in the record buffer, converting them to the appropriate data type, if necessary.