Book publishers are listed under the name in the ISBN registry or under another established name. In the Publication Forum and the data collection book publisher means a publisher who is responsible for the publisher's ISBN (not another kind of publisher or printing house). Publishers who use self-publishing ISBNs are not primarily treated as book publishers. The imprint of the parent company is classified as an independent publication channel. A publisher’s activities in different countries are considered to belong to the same publication channel. If the faculties or institutes have their own ISBNs, they are considered to be the same publication channel as the university.