3.4.2 Different editions from one source
Several methods can be used to generate different versions of a score
from the same music source. Variables are perhaps the most useful for
combining lengthy sections of music and/or annotation. Tags are more
useful for selecting one section from several alternative shorter
sections of music, and can also be used for splicing pieces of music
together at different points.
Whichever method is used, separating the notation from the structure of
the score will make it easier to change the structure while leaving the
notation untouched.