摘要
On the development of MARC,the contribution made by CLR and Henriette Avram was critical.Because of its practicability,an initiative metadata scheme,a text file type,using the experience of other libraries,and cost analysis of cataloging workflow,MARC has lasted for 40 years.IFLA and various countries developed UNIMARC and other MARC formats respectively after 1970 s.From1990s,there is a trend in turning to USMARC/MARC 21 and MARCs in XML.MARC will include more information,use external data,and integrate with FRBR.MARC may eventually return to an interchange format.
