Literature type:
Books: including monographs, textbooks, popular science books, atlases, etc.
Periodicals: including academic periodicals, trade periodicals and comprehensive periodicals.
Conference papers: including papers published at academic conferences and seminars.
Dissertations: including master's dissertations and doctoral dissertations.
Reports: including technical reports, research reports and consulting reports.
Patent documents: including invention patents, utility model patents and design patents.
Standard literature: including international standards, national standards and industry standards.
Main elements:
Knowledge content: the core elements that constitute the main body of literature, including research results, theoretical viewpoints, practical experience, etc.
Carrier: the physical or digital form of documents, such as paper and electronic documents.
Recording mode: methods and means used to record file information, such as printing, handwriting, digitization, etc.
These elements * * * are isomorphic with the basic attributes and characteristics of literature, which is helpful for readers to better understand and utilize literature resources. At the same time, different types of files and main elements also have different characteristics and use values, which need to be selected and used according to specific conditions.