...
Checksum: Also called a hash, a checksum is a randomly generated piece of data that is used to verify the fixity of a digital object (see below). It is most commonly used to detect whether a digital object has changed over time.
DPN MemberDepositor: An institution or organization working directly with an individual DPN Node to negotiate contracts, determine service levels, and deposit materials into DPN via the First Node (see below).
DPN Digital Object: An individual preservation item of preserved digital content. See also Bag.
DPN Member: An institution or organization contributing financially to support DPN (current members).
First Class Digital Object: A DPN Digital Object that is audited and its integrity is maintained. A First Class Object may contain Second Class object(s). Second Class objects are not individually audited.
...