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Abstract

The paper discusses the efforts of the PCC Task Group on Identity Management in NACO to explore and advance identity management activities. The Task Group’s work serves as a recent example of how the Program for Cooperative Cataloging has engaged the metadata community to incubate practical solutions to the perennial capacity issues that libraries face in creating and maintaining authority and bibliographic data. The Task Group's multi-pronged charge compelled several outputs including research, collaboration, education, and publication. This paper outlines the Task Group's labors within the context of the decades of innovations carried out under the banner of the PCC.  相似文献   
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The earth—with its attendant atmosphere and hydrosphere, its vegetation and animal population—forms an immensely complicated dynamic system which defies detailed analysis. Nevertheless, models based on broad generalisations can be very informative. This article1 reviews the lessons that can be learnt by regarding the whole earth-air-water system as a gigantic chemical factory.  相似文献   
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