Detail
Type Hrgr. - Rabenhorst is a Häusergruppe (Group of Houses).
Kr Plön - The Kreis for Rabenhorst is Plön. A Kreis is a government district (similar to a U.S. county).
See Dobersdorf 3) - A See notation means the entry is dependent on another entry. In this case, Rabenhorst is dependent on Dobersdorf 3), which should be consulted for additional information.