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元数据是描述数据的数据,尽管元数据概念始于20世纪末,但概念所表达的内涵及所表现的作用却早已存在。从图书馆来看,传统目录、检索文摘,以及MARC数据都具备元数据特质,且对物理资源和数字资源的管理和利用发挥了举足轻重的作用。随着数字资源的快速发展,图书馆占有的印本资源越来越少,远程访问的出版社数字资源、发现系统搜索资源,以及集成商的数据资源等越来越多;由于MARC基于印本资源进行描述,没有涵盖和整合数字资源,因此除MARC数据外,图书馆占有的元数据资源也越来越少。
Metadata is the data that describes the data. Although the concept of metadata began in the late 20th century, the connotation and the function of the concept are long existed. From the perspective of libraries, traditional directories, search abstracts, and MARC data all possess metadata features and play an important role in the management and utilization of physical and digital resources. With the rapid development of digital resources, there are fewer and fewer print resources owned by libraries. There are more and more remote access digital resources of publishers, search system search resources and data resources of integrators. Because MARC is based on printed resources Description, does not cover and integrate digital resources, so in addition to the MARC data, libraries have fewer and fewer metadata resources.