Replication is the process of sharing data between databases in different locations. Microsoft SQL Server 2005 Express Edition (SQL Server Express) uses a publishing industry model to represent the processes in replication architecture. These include Publisher, Distributor, Subscribers, publications, articles, and subscriptions.

Replication for SQL Server Express originates with a publication created in SQL Server 2005. The computer that is running SQL Server 2005 is the Publisher. The computer that is running SQL Server Express can be a Subscriber and receive data from that SQL Server database. SQL Server Express functions only as a Subscriber.