This feature enables support for Atomic Transaction for XML-Based Web Services 2.2.
To enable the WS-AT Service feature, add the following element declaration inside the featureManager element in your server.xml file:
<feature>wsAtomicTransaction-1.2</feature>
If you are developing a feature that depends on the WS-AT Service feature, include the following item in the Subsystem-Content header in the feature manifest file for your new feature:
com.ibm.websphere.appserver.wsAtomicTransaction-1.2; type="osgi.subsystem.feature"