Structure of XML messages for Event Publishing

In Event Publishing, a Q Capture program and a user application exchange Extensible Markup Language (XML) messages.

The following topics explain more about the XML messages that are exchanged and their structure:

XML message types and requirements
A Q Capture program uses XML messages to send transactions or row-level changes to a user application. The Q Capture program and user application also use XML messages to communicate.
Structure of messages from Q Capture to a user application
A Q Capture program sends both data messages and informational messages to a user application. The data messages convey changes to a source table that is part of a publication. The informational messages either confirm a user application's request with a control message, report on the status of the Q Capture program, or report publication errors.
Structure of messages from a user application to Q Capture
A user application communicates with a Q Capture program by sending messages to its administration queue. These messages are known as control messages. The user application uses these messages to report that a target table is loaded, or to request that the Q Capture program activate or deactivate a publication, or invalidate a send queue.