1. Zero-time information resources
Zero-time information resources refer to experimental records, meeting minutes, internal files, paper drafts, design drafts, and unused materials that have not been publicly used by the public. Published celebrity handwriting, spoken words and intangible ideologies. Its content is novel, but immature and unstructured.
2. Primary literature information resources
Primary literature information resources refer to new results, new knowledge and experience summaries in scientific research and work practice, which are processed and created for public use. Monographs, academic papers, patent specifications, scientific and technological reports, etc., it is the most basic document information resource.
It provides new ideas, new inventions, new technologies, and new achievements. It is creative and has direct reference, reference and use value. It is the main information resource for people to retrieve and utilize.
3. Secondary literature information resources
Secondary literature information resources refer to the collection of scattered and disordered primary documents in a specific range according to actual needs and in accordance with certain scientific methods. Methods are used to process, sort, refine, and organize, making it a system that facilitates storage and retrieval, and is a tool specifically used to search primary documents, intelligence data clues, and core knowledge. Including bibliographies, indexes, abstracts, library catalogs, etc. It is an instrumental information resource for retrieving documents.
4. Tertiary literature information resources
Tertiary literature information resources refer to the clues provided by secondary literature, selecting a large number of primary literature, and classifying them according to a certain discipline, a certain type of issue, and a certain topic , certain things and other contents are collected, conducted comprehensive analysis, summary review, systematic research, and written into a disciplinary work. It includes two categories: review research and reference tools,
such as: topic reviews, dynamic reviews, progress reports, encyclopedias, yearbooks, manuals, etc. It is highly comprehensive, highly targeted, systematic, and has knowledge and information. It has a wide scope and provides reference for people's study and research.
The working procedures of classification indexing and subject indexing of documents include three steps:
1. Conduct thematic analysis of the content discussed in the literature, and refine the theme concepts through analysis.
2. Select and assemble appropriate identifiers based on the pre-selected taxonomy and thesaurus. The classification method uses classification numbers (composed of numbers or letters plus numbers); the topic method uses standardized words.
3. List the titles or codes (such as abstract numbers) of relevant documents after the identification symbol in a certain order.
Reference for the above content? Baidu Encyclopedia - Document Information Resources, Baidu Encyclopedia - Document Processing