sentences:  Because individual court cases are identified by case citations that consist of printed page and volume numbers, the electronic text of the opinions incorporates the page numbers of the printed volumes with "star pagination" formatting—the numbers are boldfaced within brackets and with asterisks prepended (i.e., [*4]) to stand out from the rest of the text.Though West has copyright over its original headnotes and keynotes, the opinions themselves are public domain and accordingly may be found in other sources, chiefly Lexis, Westlaw's competitor.Lexis also copies the star paginated "Federal Supplement" numbering in their text of the opinions to allow for proper citation, a practice that was the subject of an unsuccessful copyright lawsuit by West against the parent company of Lexis.