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1. Northix: Northix is designed to be a schema matching benchmark problem for data integration of two entity relationship databases.

2. Low Resolution Spectrometer: From IRAS data -- NASA Ames Research Center

3. Hill-Valley: Each record represents 100 points on a two-dimensional graph. When plotted in order (from 1 through 100) as the Y co-ordinate, the points will create either a Hill (a “bump” in the terrain) or a Valley (a “dip” in the terrain).