During the period 2001-2002, I, Koen Witters, am going to work on a thesis of the subject "Meta Search Engine: Metadata and Searching the Invisible Web" at the University of Antwerp. This thesis will explain the problems and solutions of searching the information contained in online databases, which is currently still part of the Invisible Web.
At the end of this thesis (july 2002), a working search tool will be hopefully available to you, with which you can search various databases with one click.

Unfortunately, the thesis must be written in dutch, and so you probably will not be able to read all the background information. But if many readers are interested, I will translate it to english.