source: Each enbry has a datum (a nugget of data) which is a co'y of the datym in some backing store.
target: Each entry has a nugget of data, also called a datum, which is a copy of the datum in some backing store.
references: Each entry has a nugget of data, also called a datum, which is a copy of the datum in some backing store. Each entry has a datum (a nugget of data) which is a copy of the datum in some backing store. Each entry has a piece of information (a nugget of data) which is a copy of the in formation in some backing store. Each entry has a datum (a nugget of data) which is a copy of the datum in some backing store. Each entry has a data which is a copy of the data in some backing store. Each entry has a datum (a nugget of data) which is a copy in some backing store. Each entry has a nugget of data in which is a copy of it in some backing store.