Database Visualization Framework based on relational data model

This paper proposes a framework for a database visualization system. In this framework, specifications of visualization are expressed based on the relational model, and both query and specification of visualization can be described in SQL statements. We developed a database visualization system based on this framework. This system provides functional components called operator boxes to specify database queries and visualization schemes. Each operator box has a single function to modify an input database query. This system allows users to design database visualizations easily and interactively by manipulating and composing operator boxes in a 3-dimensional virtual space.