drop table dccreator;
drop table dcdate;
drop table dcdescription;
drop table dcformat;
drop table dcidentifier;
drop table dclanguage;
drop table dcpublisher;
drop table dcqRelationType;
drop table dcrelation;
drop table dcrights;
drop table dcsource;
drop table dcsubject;
drop table dctitle;
drop table hthResourceFormat;
drop table hthcontact;
drop table hthfirstVersion;
drop table hthinstitution;
drop table hthmodified;
