A computer readable storage medium includes executable instructions to receive a selection of two or more data source tables from one or more data sources, determine a data source table that defines keys, and receive mapping information that defines one or more column relationships between the data source table and a second data source table. Relationship structures between the data source tables are analyzed. The data source tables and the relationship structures are graphically represented in a sequential order where the order in which the data source tables are depicted is based on a depth of a relationship between the data source table that defines keys and a second data source table.