Significance: The external feature of literature is a literature retrieval language. A retrieval language that arranges different documents according to the word order of article titles and authors' names or according to the numerical order of report numbers and patent numbers to meet the needs of users.
Objective: Search title, author's name, publisher, report number, patent number, etc.
2. External characteristics
Meaning: the main index questions (title), author's name, publisher, report number, patent number, etc. of the retrieval language of the external characteristics of the literature. Different documents are arranged according to the word order of article title and author's name, or according to the numerical order of report number and patent number, and the retrieval language that meets the needs of users is formed through the retrieval method of article title, author and number.
Objective: Search title, author's name, publisher, report number, patent number, etc.
Extended data:
The retrieval language describing the external features of documents can be briefly summarized as follows:
1, title-title index.
2. Author-author index and group author index.
3. Document number-report number index, contract number index and access number index.
4. Others-name index, bibliography of cited documents, etc.
Baidu encyclopedia-the external characteristics of literature