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首先,介绍NSTL联合目录系统的发展现状,说明重建NSTL联合目录系统的重要意义和迫切性。而后,鉴于现有MARC元数据标准的不足,对NSTL的各类科技文献资源进行分析,设计揭示针对文献类型特征的数据逻辑结构。其中,以会议文献为例,通过实体关系图,揭示会议文献中实体的属性特征和实体间的关系。设计的数据逻辑结构主要用于指导元数据规范的编制和NSTL联合目录系统的物理实现。
First of all, introduce the development status of NSTL co-directory system, and explain the importance and urgency of reconstructing NSTL co-directory system. Then, in view of the lack of existing MARC metadata standards, this paper analyzes all kinds of scientific and technical literature resources of NSTL and designs and reveals the logical structure of data according to the characteristics of document types. Among them, taking the conference literature as an example, through the entity relationship diagram, reveals the characteristics of the entity in the conference literature and the relationship between the entities. The designed data logical structure is mainly used to guide the compilation of metadata specifications and the physical implementation of the NSTL federated directory system.