When there are multiple "official" works or original media, the question of what is canonical can be unclear. This is resolved either by explicitly excluding certain media from the status of canon (as in the case of "Star Trek" and "Star Wars"), by assigning different levels of canonicity to different media (as was in the case of "Star Wars" before the franchise was purchased by Disney), by considering different but licensed media treatments official and equally canonical to the series timeline within their own continuities universe, but not across them, or not resolved at all. The use of canon is of particular importance with regard to reboots or re-imaginings of established franchises, such as the "Star Trek" remake (2009), because of the ways in which it influences the viewer experience.