1. The original document is a document created by the author according to his own research achievements in scientific research, science and production practice. Such as monographs, newspapers, papers, conference documents, dissertations, etc.
2. The secondary literature refers to the literature formed by a large number of scattered and disorderly original documents screened, sorted, reported and organized by literature and information personnel, such as catalogues, indexes, abstracts, titles, etc. ?
3. The third literature refers to the literature compiled by systematically searching a batch of related literature and using the clues of the second literature to synthesize, analyze, study and comment on its contents. It can be divided into two types: review research and reference tools. Dynamic summary, project summary, special review and progress report belong to the former; Scientific dictionaries, encyclopedias, yearbooks, handbooks, catalogues, etc. Belong to the latter.
From primary literature to secondary literature, tertiary literature is a structured and systematic process from extensive to limited, from dispersion to concentration, from disorder to order, and from order to organic.
Extended data:
The third literature originated from the first literature and is higher than the first literature. It is a kind of re-created literature. From the perspective of literature information, the first-class literature is the retrieval object (target), the second-class literature is the retrieval tool (means), and the third-class literature is the result of information research (both the retrieval object and the retrieval means).
Primary literature is the largest, most diverse, freshest, most widely used and most influential literature in the whole literature, such as periodical papers, patent documents, scientific and technological reports, conference proceedings, dissertations and so on. These documents are obviously innovative, practical and academic.
The secondary literature is obviously collectible, systematic and retrievable. It collects not the original literature itself, but the clues of the original literature within a specific range. Its importance lies in greatly reducing the time spent searching a document.
The third document selects a large number of related documents, which are compiled through synthesis, analysis and research. Usually, it is formed by collecting a large number of relevant documents around a certain topic through secondary literature retrieval and deeply processing its contents. There are reviews, comments, summaries, progress, trends, etc. It is of high practical value to comment, summarize and predict the development trend of the existing achievements.
Try to quote the literature once. The second and third documents after processing often have the subjective tendency of the processor, and their reliability is greatly reduced.
References:
Baidu encyclopedia-literature
Baidu encyclopedia-second-hand literature
Baidu Encyclopedia-Three Documents