...Liu
The first two authors are partially supported by NSERC grant OGP-0172859 and NSERC grant STR-0181014.
...Pu
This author is partially supported by DARPA grant N00014-94-1-0845, NSF grant IRI-9510112, grants from the Hewlett-Packard Company and Tektronix.
...services.
The USECA properties here refer to Uniform access to heterogeneous information sources, Scalability to the growing number of information sources, Evolution and Composability of software and information sources, and Autonomy of participants, both information consumers and information producers.
...Autodesk,
Autodesk is a trademark of Autodesk Inc.
...MIME
MIME allows return objects to contain both text and non-textual data such as digitalized audio, images, and video
...Oraperl
a Perl based scripting language
...JDBC
Java and JDBC are trademarks of Sun Microsystems Inc, http://splash.javasoft.com/jdbc/
...URL
URL stands for Uniform Resource Locator (e.g., http://www.cs.ualberta.ca/).
...session
In the following discussion this left frame will be omitted in the screen figures for presentation convenience.

Ling Liu
Thu Aug 15 17:49:43 MDT 1996