Siebel Master Data Applications provide a Siebel platform that functions as the master file for an organization's enterprise-wide customer information. It consists of the following master file modules:

• Siebel Universal Customer Master
• Siebel Universal Activity Master
• Siebel Universal Product Master
• Siebel Universal Marketing Master
• Siebel Universal Sales Master
• Siebel Universal Service Master
• Siebel Universal Field Service Master
• Siebel Universal Identification Master

The Siebel Universal Customer Master is the base module on which all other master file modules build. These modules add extended enterprise-wide information capabilities. The Siebel Universal Customer Master module consists of a set of Siebel data model tables that store customer data; the other modules extend this concept to hold additional marketing, sales, and service data. For information about Siebel Master Data Applications, see About Siebel Master Data Applications Modules. Siebel Master Data Applications act primarily as an information database and are not intended to function as an end-user application.

When Siebel Master Data Applications are used as the master database of an organization's data, one or more of the modules—through Siebel and third-party software—interact with back-office systems and Siebel eBusiness Application deployments to provide a unified data-set across an organization's multiple channels, lines of business, and applications.

In addition to the data model mentioned previously, Siebel Master Data Applications include a data manager, an object manager, and a user interface for administrators included with the Data Steward licensing options.

Siebel Master Data Applications can be implemented in different scenarios with or without standard Siebel eBusiness Applications. Siebel Master Data Applications can also interact with other third-party back-office systems through any of the following means:

• By invoking business integration processes currently available with UAN Customer Lifecycle Management. See Siebel Business Integration Processes Guide for further information.
• By directly invoking the Application Services Interfaces, which can be published as Web Services, Java Data Beans, and so on. See Application Services Interface Reference for further information.
• By using any previously available Siebel integration technologies such as Siebel eAI, EIM (Enterprise Integration Manager), MQ Series Adapter, COM, CORBA, and so on.

Also see About Siebel Master Data Applications Framework and Interactions for further information.