In Chapter 16, you will learn how to read and interpret charts and lead sheets. These two items are essentially the same. Both are musical skeletons. Unlike classical repertoire, charts and lead sheets do not include every single note that will be played by the performer. It's up to the musician to flesh out the chart. Charts typically consist of chord symbols and a notated melody. Sometimes lyrics are also included. Other musical symbols and terms may be used, and key rhythmical patterns or ostinatos may also appear in a chart.