+@code{lilypond-book} provides the following commands and environments to
+include music in HTML files:
+
+@itemize
+
+@item
+the @code{<lilypond ... />} command, where you can directly enter short
+lilypond code
+
+@item
+the @code{<lilyond>...</lilypond>} environment, where you can directly
+enter longer lilypond code
+
+@item
+the @code{<lilypondfile>...</lilypondfile>} command to insert a lilypond file
+
+@item
+the @code{<musicxmlfile>...</musicxmlfile>} command to insert a MusicXML
+file, which will be processed by @code{musicxml2ly} and @code{lilypond}.
+
+@end itemize
+
+In the input file, music is specified with any of the following commands:
+
+@example
+<lilypond options go here>
+ YOUR LILYPOND CODE
+</lilypond>
+
+<lilypond options go here: YOUR LILYPOND CODE />
+
+<lilypondfile options go here>@var{filename}</lilypondfile>
+
+<musicxmlfile options go here>@var{filename}</musicxmlfile>
+@end example