A topic namespace is a grouping of topics that allows information to be shared between applications.
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You use a permanent topic namespace to statically define the association between a WS-Notification topic namespace URI and a service integration bus topic space destination.
A permanent topic namespace has the following characteristics:
- You can use it to expose an existing service integration bus topic
space for use by WS-Notification clients, thus permitting interoperation
between the WS-Notification applications and existing publish and
subscribe applications connected to the bus such as JMS.
- You can use it to restrict the structure and content of the topic
namespace by applying one or more topic namespace documents that describe
the required structure.
- You can use it as part of a topic space mapping configured on
a service integration bus link (between two service integration buses)
or a topic mapping as part of a publish and subscribe bridge between
a service integration bus and a WebSphere® MQ network.
When you create a new WS-Notification permanent topic namespace, you specify the namespace and associate it with one of the service integration bus topic spaces configured on the bus on which the parent WS-Notification service is defined. You cannot modify a permanent topic namespace after it has been created, other than to apply or remove topic namespace documents.
- Namespace
- The URI string by which this topic namespace is known.
- Service integration bus topic space
- The service integration bus topic space with which this namespace is associated.
- Message reliability
- The service integration bus reliability to apply to messages published to this topic namespace.
- Topic namespace documents
- The collection of topic namespace documents that define the structure of the topic namespace.