A ContentFilteredTopic is a Topic with filtering properties. It makes it possible to subscribe to topics and at the same time specify that you are only interested in a subset of the Topic’s data.
For example, suppose you have a Topic that contains a temperature reading for a boiler, but you are only interested in temperatures outside the normal operating range. A ContentFilteredTopic can be used to limit the number of DDS data samples a DataReader has to process and may also reduce the amount of data sent over the network.
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