Information integration (II) is the merging of information from heterogeneous sources with differing conceptual, contextual and typographical representations.

Enterprise information integration (EII) supports a unified view of data and information for an entire organization.  It is used in data mining and consolidation of data from unstructured or semi-structured resources. Typically, information integration refers to textual representations of knowledge but is sometimes applied to rich-media content.

Also has been referred to as Enterprise Content Integration (ECI).

Also see:

The Gilbane Report: Vol 12, Num 6 — What is Enterprise Information Integration (EII)?