Figure 2

GCOD Database Schema. The schema for the GCOD database consists of 12 tables in a "star" layout. The main 'fact' table, dbadata, is split into 3 tablespaces that are distinguished by the algorithm used to generate the data, either MAS5, RMA, or scaled RMA, resp. The remaining tables are 'dimension' tables that contain characteristic and attribute information about the objects in the database. Lines and arrows indicate the relationships between tables and the key field linking the tables together.