Publication Matched Status

Attribute	Attribute Meaning
total_count	Total cumulative count the concerned DataWriter discovered a “match” with a DataReader. That is, it found a DataReader for the same Topic with a requested QoS that is compatible with that offered by the DataWriter.
total_count_change	The change in total_count since the last time the listener was called or the status was read.
last_subscription_handle	Handle to the last DataReader that matched the DataWriter causing the status to change.
current_count	The number of DataReaders currently matched to the concerned DataWriter.
current_count_change	The change in current_count since the last time the listener was called or the status was read.

The DataWriter has found a DataReader that matches the Topic and has compatible QoS or ceased to be matched with a DataReader.