SharePoint Fields (Columns) XML is essential for every SharePoint Object Model development. Multiple User Field < Field ID ="{f6377553-35fc-4166-9cc3-88fa32a5d7dd}" Name ="WFCApprovers" DisplayName ="WFC Approvers" Type ="UserMulti" Required ="FALSE" UserSelectionMode ="0" Group ="Custom" > </ Field > UserSelectionMode Options: 0 - PeopleOnly , 1 - PeopleAndGroup Single User Field < Field ID ="{f6377553-35fc-4166-9cc3-88fa32a5d7dd}" Name ="UserField" DisplayName ="User Field" Type ="User" Required ="FALSE" UserSelectionMode ="1" Group ="Custom" > </ Field > Boolean Field < Field ID ="{6ed8dbbf-4726-4a63-b358-e4797149a8ba}" Name ="Booleanfld" DisplayName ="Boolean Feild" Type ="Boolean" ...