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====== TOPIC_DATA QoS Parameter ======
[[ddsf:public:guidebook:06_append:02_quality_of_service:start|return to the Quality of Service (QoS) Parameters ]]

The TOPIC_DATA [[ddsf:public:guidebook:06_append:glossary:q:quality_of_service_qos_policies|QoS]] allows the application to attach additional information to the created [[ddsf:public:guidebook:06_append:glossary:t:topic|Topic]] such that when a
remote application discovers their existence it can examine the information and use it in an application-defined way. In combination with the listeners on the ''DataReader'' and ''DataWriter'' as well as by means of operations such as ignore_topic, these QoS can assist an application to extend the provided QoS. 

Source: [[https://www.omg.org/spec/DDS/1.4/PDF | DDS 1.4 Spec]]

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