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万维网的迅速发展，促进了网络信息资源的急速膨胀，在带给人们更多信息的同时，也增加了人们查找网络信息资源的困难。为有效解决这一迫在眉睫的问题，无数据的概念应运而生。所谓无数据协嘲的ta），类似于传统的二次文献，是专门用来描述数据的特征和属性的数据，可简单理解
The rapid development of the World Wide Web has promoted the rapid expansion of the network information resources, bringing more information to people as well as increasing the difficulty of searching for network information resources. In order to effectively solve this imminent problem, the concept of no data came into being. The so-called no data Xie ridicule ta), similar to the traditional secondary literature, is designed to describe the characteristics of data and attributes of data can be easily understood