Special documents generally include conference documents, scientific and technological reports, patent documents, dissertations, standard documents, scientific and technological archives and government publications.
Special literature is a kind of scientific and technological literature with special publishing and obtaining ways. It is a very important information source with distinctive features, extensive content, huge quantity and high reference value, and occupies an important position in medical literature retrieval.
expanding materials
1. The conference documents are characterized by timely information transmission, novel content, strong professionalism and pertinence, various types and various publishing forms. It is an important part of scientific and technological literature, which is generally selected and of high quality. It can reflect the new discoveries, new achievements and new achievements in science and technology and the development trend of disciplines in time, and it is an important information source. Conference documents can be divided into three types: before, during and after the conference.
2. Dissertations
Dissertations are papers written by graduates of institutions of higher learning and scientific research to obtain degrees at all levels. Academic opinions or conclusions put forward through a lot of thinking work are original to some extent. There are many and comprehensive references, which are helpful to track and retrieve related documents. Generally, it is not published publicly, and the simple abstract data can no longer meet the needs of readers, and the demand for the full text of electronic papers is on the rise.
3. Patent literature
integrates technical, legal and economic information; The content is novel and published quickly; Reliable content; The content is detailed and the format is standardized; Repeatability.
4. Publications
The constituent elements of publications
The information and knowledge needed by readers constitute the content; State information knowledge in a certain way, including words, images, symbols, audio, video, codes, etc.; Taking a certain material carrier as the basis for the existence of knowledge information; Attaching knowledge information to the material carrier by a certain production method; Presented in a certain appearance.
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