Drum notation has become much more consistent over the past few years, largely because of computer programs. But it is still far from being standardized. In some areas of this book, a particular notation scheme (developed specifically for DnB beats) appears. For the basics of music notation, or to learn about the standardized world of music notation (a full explanation of stems, rests, repeats, etc), check out any basics of music book.
Music notation is merely a means to an end. In most places, I have notated the rhythms in a manner that I feel will convey the message to the reader most easily. As a professor of mine once said, as he held up a jazz band chart, “This is not music. What is music is whatever comes out of your instrument.”
Here is the legend:
And here are examples of new notations you will find in various places in this book: