Note the distinction between the name of the context type,
@code{Staff}, @code{Voice}, etc, and the identifying name of a
-particular instance of that type, which can be any sequence of letters
-and digits invented by the user. The identifying name is used to
+particular instance of that type, which can be any sequence of letters
+invented by the user. Digits and spaces can also be used in the
+identifying name, but then it has to be placed in quotes,
+i.e. @code{\new Staff = "MyStaff 1" @var{music-expression}}.
+The identifying name is used to
refer back to that particular instance of a context. We saw this in
use in the section on lyrics, see @ref{Voices and vocals}.