SessionDatabase session-data
It is possible for multiple catalogs to share the same session file. This allows a ``mall'' to be set up where many store fronts use a common ordering point. It would be wise to share the order pages, salestax database, and shipping database if that is the case. You will also need to set SessionLockFile appropriately if the database is to be shared. Defaults to session, which is appropriate for separate session files (and therefore standalone catalogs). Can be an absolute path name if desired.