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知识时代,人类越来越依赖于网络资源,人类的合作关系越来越紧密。基于元数据的描述与互操作正成为组织、交互网络资源的一种有效技术。通过对比数据结构,研究了元数据的本质与特点。介绍了都柏林核心元数据和修饰元数据。研究了资源描述框架RDF的数据模型和互操作特征。通过实例比较了都柏林元数据的HTML和RDF描述。最后介绍了基于CDF、PICS、OSD/DRP、DSig和EC/EDI等的信息资源交换方式。
In the era of knowledge, human beings rely more and more on network resources, and human cooperation is getting closer and closer. Metadata-based description and interoperability are becoming an effective technique for organizing and interacting with network resources. By comparing the data structure, we study the essence and characteristics of metadata. Introduced Dublin Core Metadata and Metadata Metadata. The data model and interoperability characteristics of Resource Description Framework (RDF) are studied. The HTML and RDF descriptions of Dublin Metadata are compared by examples. Finally, the exchange of information resources based on CDF, PICS, OSD / DRP, DSig and EC / EDI is introduced.