[opensuse-buildservice] How does one share source file between packages?

How does one share source files between packages? I am sorry if this is a dumb question, but I have read references to linking but nothing that would tell me how to do it. Thank You. -- Paul Elliott 1(512)837-1096 pelliott@BlackPatchPanel.com PMB 181, 11900 Metric Blvd Suite J http://www.free.blackpatchpanel.com/pme/ Austin TX 78758-3117