There is a partial application, including two entities, the publishing house and the author are many-to-many entities
A local application consisting of two entities is usually many-to-many. The publishing house was usually responsible for publishing various types of books, including novels, essays, poems, and so on. The author referred to the person who created the book. He could be a professional, an amateur, a novelist, and so on. These entities may have different roles such as editors, editors, reviewers, and editors. There may also be some cooperative or competitive relationships between them. In addition, there may be some competition or cooperation between different publishing houses and authors to strive for more publishing opportunities and higher royalties. Therefore, a local application is composed of multiple entities, and there may be complex relationships and interactions between these entities.