2
something such as a book, play, or piece of software that is in the public domain can be used by anyone and is not protected by copyright (=a law that gives only one person the right to produce, sell, or use something) (书、剧本、软件等的)不受版权保护的,无版权限制的 Synonyms and related words
Relating to the business of publishing: asset, backlist, bibliography...