The following are some terms and phrases and corresponding context when used in relation to DPN. This list is currently being compiled from the primary terms used in documentation to date and will be filled out over the next week or two.
Common Terms
AMQP (Advanced Message Queuing Protocol): "[A]n An open standard for passing business messages between applications or organizations. " Implemented Implemented in DPN to communicate and coordinate activities between nodes in the DPN network. more info...
Auditing: Demonstrating that DPN is providing the preservation services it has contracted to provide for DPN Members. Auditing will be done at several different levels, including object management, preservation actions and infrastructure.
Bag: An individual preservation item stored in BagIt format (see below).
BagIt: A "hierarchical file packaging format designed to support disk-based storage and network transfer of arbitrary digital content." DPN uses this format for the storage of digital objects, ensuring the integrity of each preserved object for durability. more info...
Brightening:
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 Member: An organization "work[ing] 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.
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.
First Node: DPN Members will work directly with an individual DPN Node to negotiate contracts, determine service levels, and deposit materials. This node is known as the "First Node."
Fixity: Checking the fixity of a digital object is the process of verifying that it has not been changed or corrupted.
Ingestion: The process of bringing DPN Member content into the network. Ingestion happens via a DPN First Node.
Node: Content is held in DPN at nodes. These are individual organizations and institutions that provide storage and preservation actions for DPN members.
Package: Organizing and grouping content into discrete units, particularly for storage and data transfer. DPN will be using Bags as an organizational unit. (See See "Replicating Node" below.Package: Same as "Bag" above.)
Registry: DPN will maintain a registry of replicated content to allow management of the network. It will track the identity, source, location, and fixity of content in DPN.
Replicating Node: DPN will replicate the content from the First Node (see above) to other DPN Nodes, known as Replicating Nodes. Content in Replicating Nodes will be held “dark”, and inaccessible except for preservation actions.
Succession: "As As a preservation network for the academy and by the academy, content preserved in DPN will be covered by succession rights that will allow the content to be used in the future by the academy after the dissolution of the source of the content."
TDR (Trustworthy Digital Repository): A repository certified as meeting TRAC requirements.
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