Visualization Schemas and a Web-based Architecture for Custom Multiple-View Visualization of Multiple-Table Databases Chris North Nathan Conklin Kiran Indukuri Varun Saini Center for Human-Computer Interaction Department of Computer Science Virginia Polytechnic Institute and State University Blacksburg, Virginia, USA Correspondence: Chris North, Computer Science, Virginia Tech, Blacksburg, VA 24061 USA Tel: 540-231-2458; Fax: 540-231-6075 E-mail: north@cs.vt.edu http://infovis.cs.vt.edu/