Here are some useful Links ...
A Data Integration Architecture
A Book by on Information Architecture by Rosenfeld and Morville, derived from a Library Science background,
and therefore of limited value.
An Interview with Rosenfeld, (see above).
A Tutorial on Information Architecture from WebMonkey
A Data Integration Architecture is a Diagram showing the major Components
and their relationships within an overall Framework which integrates data from different sources.
Here's a Word document showing an example for a Data Architecture for an e-Commerce Web Site
The University of Texas at Austin has put some good information on their Web Site.
Here's a section which defines
some basic terms,
and here's a Tutorial on