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资源描述与检索(Resource Description and Access,简称RDA)是数字环境下诞生的新编目规则,必然与旧的MARC21格式中有部分不兼容的地方。文章在阐述MARC21修订背景的基础上,通过对美国国会图书馆MARC标准中公布的样例加以筛选,用以说明MARC21针对RDA规则中的新元素对字段及子字段进行的修订及变化。
Resource Description and Access (RDA) is a new cataloging rule born under the digital environment, which is bound to be partly incompatible with the old MARC21 format. Based on the revised MARC21 background, the article screened samples released by the MARC in the US Library of Congress to illustrate MARC21’s revisions and changes to fields and sub-fields for new elements in the RDA rules.