Allow me to quote the license (actually, every Creative Commons license
itself, since they all include this clause):
"'Work' means the literary and/or artistic work offered under the terms of
this License including without limitation any production in the literary,
scientific and artistic domain, whatever may be the mode or form of its
expression including digital form, such as a book, pamphlet and other
writing; a lecture, address, sermon or other work of the same nature; a
dramatic or dramatico-musical work; a choreographic work or entertainment in
dumb show; a musical composition with or without words; a cinematographic
work to which are assimilated works expressed by a process analogous to
cinematography; a work of drawing, painting, architecture, sculpture,
engraving or lithography; a photographic work to which are assimilated works
expressed by a process analogous to photography; a work of applied art; an
illustration, map, plan, sketch or three-dimensional work relative to
geography, topography, architecture or science; a performance; a broadcast; a
phonogram; a compilation of data to the extent it is protected as a
copyrightable work; or a work performed by a variety or circus performer to
the extent it is not otherwise considered a literary or artistic work."
I don't think they really need to be so thorough, but...