Definition of MARC MARC is the abbreviation of Machine Readable Catalog (ue), which means "machine-readable catalog", that is, a catalog that is recorded on a computer storage carrier in the form of code and a specific structure, and is recognized and read by a computer. MARC can be input once and used multiple times, and it is the product of information technology development and resource sharing requirements. MARC data was first produced in the United States. In 1961, the Library of Congress began the idea of ​​library automation. With the advancement of computer technology, in 1963, the Library of Congress organized a feasibility survey on the use of electronic computer technology in internal work. In January 1966, it produced "Recommendations for standard machine-readable catalog styles", that is, MARC-1 format, MARC-2 was proposed in 1967, it is the mother of various machine-readable catalog formats currently in use. In 1969, the MARCII format bibliographic tape was distributed to the whole country, and the MARCII format was called US-MARC, that is, the US machine-readable catalog. As a data format formed early in the development of computer technology, this format takes full account of the needs of library bibliographic data in terms of document form description, content description, retrieval, etc. when it is defined, as follows: the number of fields is large; the description is detailed ; There are many searchable fields; the combination of fixed-length and indefinite-length fields is flexible and practical; the characteristics of main items and traditional catalogs are retained; the functions of expansion and modification are strong; and they can continue to develop and improve in practice. The U.S. machine-readable catalogue is suitable for the national conditions of the United States. Britain, France and other countries have created their own machine-readable catalogues. In order to further coordinate and promote international exchanges and unify the format of the machine-readable catalogues of various countries, the International Federation of Libraries has formulated the "International "Machine Readable Directory Communication Format", or UNIMARC, is now used in many countries for cataloging documents. There are many versions of MARC. For example, CNMARC refers to the MARC standard in mainland China, and other MARC standards such as UNMARC are used in Hong Kong and Taiwan. Introduction of CNMARC CNMARC is an abbreviation of China Machine-Readable Catalogue. It is used for the exchange of bibliographic information in a standard computer-readable form between the Chinese National Bibliographic Agency and other national bibliographic agencies, as well as domestic libraries and information departments in China. The Chinese machine-readable catalog was developed in the 1970s. In 1979, the National Information and Documentation Standardization Technical Committee was established, and the Beijing-based machine-readable catalog development team was established. In 1982, the China National Bureau of Standards announced the national standard "Tape Format for Document Catalog Information Exchange" (GB2901-82), which was established with reference to ISO2709 It laid the foundation for the standardization of Chinese MARC format; UNIMARC Chinese translation was published in 1986. On this basis, according to China's actual situation, the "China Machine Readable Directory Communication Format" discussion draft was prepared, and in February 1992, the "China Machine Readable Directory Communication Format" was officially published, namely CN-MARC. The CNMARC format provides a guarantee for China's machine-readable catalogs to achieve standardization and integration with international standards in terms of data structure. The role of MARC data Using MARC data for book interviews, you can use the book's ISBN number to transfer the book title, the person in charge, and other book contents, thereby simplifying the entry of book purchase data. It is best to purchase library software to support MARC data import and export functions, which greatly reduces the current and future workload of book entry. It can avoid the risk of re-entering data when changing software in the future. The use of MARC data for book cataloging can directly transfer the book content into the book management system for cataloging, making the book cataloging work fast and accurate. Readers can book new books to be published to readers through the Internet, and then book system software to collect popular books, and actually book. The enhanced online version of "Gold Disc Library Management System" comes with a 2.8 million CNMARC format bibliographic database, supporting the import and export of CNMARC format bibliographic data, which can greatly reduce the workload of catalog entry. If your book is in the 2.8 million bibliographic library, directly scan the book's own barcode to automatically call the bibliography.
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