openhab/openhab — pull request #1444 by Lenzebo (2014-09-20 10:52:44+00:00)
Title: Added Possibility to filter incoming messages for MQTT subscriber

If multiple types of messages are broadcasted on one MQTT topic, then this change allows to just process messages that match a regular expression and skip all the others

Thus the binding configuration for incoming messages is extended by a fifth (optional) field that defines a regular expression. like:
mqtt="<[:::[:]]