(1) A defined connection between the rows of a table or the rows of two tables. A relationship is the internal representation of a referential constraint.
(2) An association between two or more data entities in the WebSphere business integration system. Most often, these entities are business objects. Relationships are used to transform data that is equivalent across business objects but is represented differently.
(3) A semantic connection among model elements. Examples of relationships include associations and generalizations.
(4) An association between two components that enables management applications to perform or assist in operations, such as problem determination, based on an understanding of that association. Types of relationships include the federates relationship, has components relationship, hosts relationship, supersedes relationship, and uses relationship.
(5) Pertinent to remote copy and Peer-to-Peer Remote Copy, the association between a master virtual disk (VDisk) and an auxiliary VDisk. These VDisks also have the attributes of a primary or secondary VDisk. See also auxiliary virtual disk, secondary virtual disk, master virtual disk, primary virtual disk.