In WebSphere MQ Publish/Subscribe, all publications must be tagged with an arbitrary character string called a topic. This defines the subject matter of the publication.
WebSphere MQ Publish/Subscribe recommends, though this is not enforced, that topic strings are structured into a number of fields or levels using the forward slash, "/", as a delimiter.
WebSphere Message Broker publications also have a topic associated with them, and the topic structure is delimited by the forward slash character.
Therefore, if your existing applications follow the WebSphere MQ Publish/Subscribe recommendation, they are better positioned to exploit the function provided by WebSphere Message Broker, which allows the structure of the topic to be externalized.
WebSphere Message Broker allows you to control users' authority to publish on, and subscribe to, any topic at any level within the topic structure.
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