Wild cards in topic mapping

Wild cards can be used in topic mapping on a WebSphere MQ link for publish/subscribe messaging, but there are differences between wild cards in WebSphere Application Server service integration, and wild cards in a WebSphere MQ network.

Publish/subscribe messaging in the WebSphere MQ network uses wild cards # and +. These wild cards are represented as /. and * respectively in the service integration bus. However, the publish/subscribe bridge on the WebSphere MQ link supports only the /. wild card, and only at the end of the topic. For example, stock//. in the service integration bus is equivalent to stock/# in the WebSphere MQ network, meaning all messages with "stock" at the beginning of the topic.

When you use wild cards in the topic mappings that you enter on the WebSphere MQ link console panels, use the publish/subscribe bridge symbols, not the equivalent WebSphere MQ network symbols. The publish/subscribe bridge handles conversion automatically.

Related tasks

Add topic mappings on the WebSphere MQ link publish/subscribe broker

Topic names and use of wildcard characters in topic expressions