You understood correctly. Download the Pronto Hex IR Format document by Barry Gordon from the Pronto Files Section if you want to know more and then see this post.

[Link: remotecentral.com]

This thread references Sony DVD codes. However, all Sony codes once learned, have only repeating data and no one-shot data. What I did was to duplicate the whole batch of code data one time and then set the first copy as one-shot and the second copy as repeating.