Registration groups and capture registrations define the source data for which you want PowerExchange to capture changes and are required for CDC processing.

A registration group defines the data source location, the data source type, the collection identifier, and, optionally, the user ID and password for accessing the source data. When you add a registration group, PowerExchange adds an extraction group and application group with the same name.

A registration group contains one or more capture registrations. A capture registration specifies a data source for which to capture changes. A capture registration also specifies the condense option to use and the registration status. The capture registration name is the name that you specify when you create the registration.

When you add a capture registration, PowerExchange adds an extraction map for that registration. PowerExchange assigns a registration tag name to both the capture registration and the generated extraction map. If you manually add an additional extraction map for a capture registration, the extraction map has the same registration tag name as in its associated capture registration. The registration tag name format varies depending on the source type.

To create a capture registration for nonrelational sources such as Adabas, IMS, and VSAM sources, you must first create a data map for the source. For nonrelational sources, data maps provide the metadata used to define capture registrations and extraction maps for CDC.

The CCT file contains information for capture registrations defined in the PowerExchange Navigator. The registration group filters the capture registrations from the CCT file for display in the PowerExchange Navigator.

After you add a capture registration, you can change some of its properties.