1, comprehensive:
The third-level information is synthesized and analyzed on the basis of a large number of related documents. Synthesis means that a large number of scattered information, facts and data about a specific topic are synthesized, evaluated and screened, and briefly described in concise words, with very general contents.
It can be a vertical synthesis, such as a review of the past, present and future of a subject; It can also be a horizontal synthesis, such as a comparative review of similar products in various industrial sectors.
2. Targeted:
The third kind of information is compiled for a specific purpose by collecting a large number of relevant documents, analyzing and synthesizing them. Therefore, it has a strong pertinence, that is, aiming at the information needs of specific users and serving specific purposes.
3, scientific:
The third kind of information is a summary of specific professional topics on the basis of existing knowledge achievements. So its viewpoint is mature, its content is reliable, it has materials, facts, data, suggestions and conclusions, and it is highly scientific. It can generally provide direct reference, reference and use, so it is generally valued by researchers and managers.
The connotation of tertiary information and its literature expression;
Connotation:
(1) Deep processing of primary information:
After selection, analysis and comprehensive induction, a piece of information loses its original form, but it has high utilization value and can sometimes become a knowledge unit that can be widely used.
(2) For example:
For example, introductory materials on specific topics. We often need to consult experts when we encounter some specific problems. At this time, the expert's consultation and answer is a typical three-time information. Experts can provide a series of guiding opinions on a particular topic. These opinions are all information, not the original state, but they are all information with quality assurance and thematic characteristics.
Although the guidance provided by an expert has a source, he may not be able to provide an accurate source, because the information has gone through a lot of processing and transformation from generation to provision through him.
Document expression:
The literature expression of tertiary information is tertiary literature. The three typical documents are manuals, guidebooks, dictionaries, yearbooks and other special data sets.