Extended RDBMSs by Judy Davis The first in a two-part series, this article addresses the application requirements that drive efforts to extend the RDBMS to handle complex data. It also describes the components of an extensible data management architecture and the core features required to achieve RDBMS server extensibility. Unlocking the Mainframe by Martin Rennhackkamp Web-enabling legacy applications gives new life to your systems. This article explores the technical issues and architectures involved in making legacy databases accessible from a Web browser. Converting Data for Warehouses by Kathy Bohn The data conversion process is the very root of a good, functional data warehouse. This article walks you through each step in the process, from selecting criteria for your conversion plan to extracting source data, moving, loading, and indexing the data, and assuring quality of the data. Tools for Traveling Data by Joseph Williams Loading data into the warehouse database is one of the most important steps in building a data warehouse. This article surveys the current tools for extracting, cleaning, and transforming data and analyzing and ensuring data quality. A product chart accompanies this article on page 77.

From the Editor by Maurice Frank Three vendors to watch. Enterprise C/S by Judith Hurwitz The necessity of components. Data Warehouse Architect by Ralph Kimball Defining the central data warehouse team. SQL for Smarties by Joe Celko Security, sessions, and Swedes. Application Architect by David S. Linthicum Inside Microsoft Repository 1.0. Server Side by Martin Rennhackkamp How extendable is your database? Object.Client by Tom Spitzer Online payment systems.

Hands-On Reviews Edited by Betsy Slattery Applet Designer from TV Objects Corp. is a Visual Basic add-in that converts new or existing VB applications into Java applets. XDB Systems Inc.'s JetConnect lets users write Java applications and Java applets that access ODBC-enabled databases. Soft Notes, new products and upgrades.

Letters Event Alerter A calendar of conferences, trade shows, and seminars. Client/Server Connection News from around the industry. Advertiser Directory Links to this month's advertisers.