Editing Source Relations Perform this procedure to modify the relations in the basic composer. Edit source relations Click the Designers tab. Right-click a basic composer, and click Detailed Properties > Source Relations. Join the two tables using the primary keys. A left outer join is created. Click OK. Compile the composer. Right-click the composer, then click Compile. Click the Start button. Edit relations in the fact composer. On the DWD Designer main menu, click Design > Relations Manager. The star schema is now being built. Create inner joins between the dimension composers and the fact table composers. Click OK.