This topic and its subtopics describe the terminology
that you need to be aware of when working with WS-Notification in WebSphere® Application Server:
Note: The WS-Notification specifications define a
TopicNamespace as
a grouping of topic trees for administrative purposes. Service integration
technologies defines a similar term
topic space as a
destination used for publish and subscribe messaging. Although these
concepts are similar, they are not identical. For example it is possible
for there to be a 1-1 relationship between a WS-Notification topic
namespace and a service integration bus topic space, but in many situations
this is not the case. For more information, see
Options for associating a permanent topic namespace with a bus topic space.