ordered presentation

Sometimes, you may want a set of data for the same DataWriter to be presented to the receiving DataReader only after ALL the elements of the set have been received. In this example we illustrate how to use Group access_scope for the order in which samples are presented to the subscribing application.
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Usually DataReaders receive data in the order that it was sent by a DataWriter. In addition, data is presented to the DataReader as soon as the application receives the next value expected. In this example we illustrate how to control the scope of the order in which samples are presented to the subscribing application.
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