A complex relation is a characteristic that shows how two or more assets are related to one another. It can have attributes of its own, for example, Description and Priority. Technically, a complex relation is an entity that can't exist on its own. It exists only through its links to other assets. The complex relation type defines which relations and attributes a complex relation can have.
Complex relations are shown as relation views on asset pages.
Note A complex relation can't have more than 32,767 relations to assets.