Annotation is the author's own detailed explanation of this noun or concept, which is used to explain it to people who don't know this kind of topic yet. Annotation is a necessary supplement, explanation and explanation to the title, author and specific content of the manuscript.

The notes of the paper are divided into explanatory notes and citation notes, because the notes also indicate the contents cited in the paper. This type of annotation is very similar to references. In the publication of papers, there are also cases where there is no requirement for annotations, so overall, the importance of annotations is slightly lower than that of references. Whether to take notes depends on the necessity of the article, the specific writing requirements and the author's own writing habits.

Comments on the title of the article, including the background, topics, fund projects, etc. If it is a series of papers, it should explain the title, published newspapers and periodicals, and time (number of issues) of the previous papers for readers' reference. Notes to the author, namely "author profile", including name, gender, work unit or address, professional title, degree, postal code, etc.

There are some differences in the writing format of different types of comments. For example, the annotations of works are different from those of journal papers, and the formats of dissertations, newspaper documents or online documents are also different. The author should write according to the actual situation of his article.