A- Academic papers on theoretical and applied research (including summary reports);
B- practical technical achievement report (science and technology), theoretical study and social practice summary (social science);
C- Business guidance and technical management articles (including leadership speeches and special comments, etc.). );
D- General dynamic information (newsletters, reports, meetings, interviews, etc.). );
Electronic documents and materials (including historical materials, statistical data, institutions, people, books and periodicals, knowledge introduction, etc.). ).
The function of document identification code is to classify articles according to their contents, so as to facilitate document statistics, periodical evaluation, determine the retrieval scope of documents and improve the applicability of retrieval results.
The specification has different requirements for different article formats. Class A articles are required to have Chinese and English titles, work units, abstracts and keywords, as well as the Chinese pinyin of the author's name; Class B and C articles require Chinese titles and author names.
Extended data:
For precipitated documents in monographs and papers, it is recommended to use the single letter "A" for document type identification; For other unspecified literature types, it is suggested to use the single letter "Z".
The following two letters are suggested to be used as identification for references of electronic literature types such as databases, computer programs and bulletin board system.
For electronic documents with non-paper carriers, when they are cited as references, the carrier type should be indicated in the reference type identification. This specification suggests using two letters to indicate the carrier type of electronic documents: magnetic tape)-MT, magnetic disk)-DK, CD-ROM-CD, online)——OL network -OL.
Baidu Encyclopedia-Document Identification Code