Document retrieval methods include the following:
1. Author route. Many retrieval systems have author indexes and institutional (institutional authors or author’s institution) indexes. The patent document retrieval system has Patentee indexes. The method of using these indexes to search alphabetically from the names of authors, editors, translators, patentees, or institutions and organizations is collectively referred to as the author route.
2. The title includes book title, journal title, article title, etc. Some retrieval systems provide ways to search in title order, such as book title catalogs and journal title catalogs.
3. Classification approach Search documents according to the subject classification system. This approach is classified and sorted with the knowledge system as the center. Therefore, it can better reflect the systematic nature of the discipline and reflect the affiliation, derivation and parallel relationship between the discipline and things. It is convenient for us to search for literature materials from the scope of the discipline, and can start To the effect of "paradigmatic". Retrieval of literature materials from classification methods mainly uses classification catalogs and classification indexes.
4. Theme approach Retrieve documents through subject words that reflect the content of the literature. Since the topic method can reflect all aspects of literature on a topic, it is convenient for readers to conduct comprehensive and systematic thematic research on a certain issue, thing or object. We can find all aspects of literature on the same topic through the subject directory or index.
5. Citation path The references or cited documents attached to the document are one of the external characteristics of the document. The indexing system compiled using this kind of citation is called a citation index system. It provides a way to retrieve citing papers from cited papers, which is called a citation pathway.
6. Serial number path Some documents have specific serial numbers, such as patent numbers, report numbers, contract numbers, standards numbers, International Standard Book Numbers and journal numbers, etc. Document serial numbers are clear, brief, and unique for identifying certain documents. Various serial number indexes compiled accordingly can provide a way to retrieve document information in the order of the serial numbers themselves.
7. Code approach: An index compiled using a certain code of things, such as molecular formula index, ring system index, etc., can be retrieved from a specific code sequence.
8. The specialized project approach searches in a specific order from terms, place names, names of people, names of institutions, names of goods, names of biological genus, dates, etc. contained in or related to the literature information, which can solve certain problems. Special problem.