Willow: a uniform search interface.

The objective of the Willow Project is to develop a uniform search interface that allows a diverse community of users to retrieve information from heterogeneous network-based information resources. Willow separates the user interface from the database management or information retrieval system. It provides a graphic user interface to a variety of information resources residing on diverse hosts, and using different search engines and idiomatic query languages through networked-based client-server and Transmission Control Protocol/Internet Protocol (TCP/IP) protocols. It is based on a "database driver'' model, which allows new database hosts to be added without altering Willow itself. Willow employs a multimedia extension mechanism to launch external viewers to handle data in almost any form. Drivers are currently available for a local BRS/SEARCH system and the Z39.50 protocol. Students, faculty, clinicians, and researchers at the University of Washington are currently offered 30 local and remote databases via Willow. They conduct more than 250,000 sessions a month in libraries, medical centers and clinics, laboratories, and offices, and from home. The Massachusetts Institute of Technology is implementing Willow as its uniform search interface to Z39.50 hosts.

Collaborative development of a uniform graphical interface.

A uniform graphical user interface to informational databases is evolving at the University of Washington through a collaborative development process. The interface, called WILLOW, has grown from model analysis and preliminary design to working prototype. The design replicates a natural flow of search retrieval. Development continues in a spiral of test and linear improvements based on user analysis. WILLOW's internal structure is built on a Unix client-server model communicating over the campus TCP/IP backbone network. Its external structure is an X-Windows/Motif visual presentation emphasizing a simple, consistent, graphical face to disparate information databases. The WILLOW collaborators have grown from an initial group composed of the Health Sciences Library & Information Center and Computing & Communications' Information Systems to the University Libraries, Computing & Communications divisions, Medical Center Information Systems, and departments throughout the health sciences.