Abstract

The Digital Government Research Center (DGRC) has completed phase one of the Energy Data Collection (EDC) project. In this paper, we present the results of building and evaluating system components, along with plans for phase two of the project. Phase one focused on data about petroleum products' prices and volumes, provided by the Energy Information Administration, the Bureau of Labor Statistics, and the Census Bureau, and the California Energy Commission, in the form of over 50,000 data tables. This research centers on providing dynamically planned access to multiple non-homogeneous databases and other data collections, using a query planner and a largescale (90,000-node) concept ontology and a domain model, both of which are accessed via various interfaces, including cascaded menus, a natural language question analyzer, and an ontology browser.

Date

2002

Authors

Laura Zadoff, Judith L Klavans, José Luis Ambite, Andrew Philpot, Samuel Popper, Walter Bourne, Surabhan Temiyabutr, Eduard Hovy, Peter T Davis, Yigal Arens, Ken Ross, Peter Sommer