What is Archival Bond?

Legal Definition
The archival bond is a concept in archival theory referring to the relationship that each archival record has with the other records produced as part of the same transaction or activity and located within the same grouping. These bonds are a core component of each individual record and are necessary for transforming a document into a record, as a document will only acquire meaning (and become a record) through its interrelationships with other records.
-- Wikipedia
Legal Definition
The way records link back to the original activity, creator, or use.