随着Internet技术的快速发展,Web数据库数目庞大而且仍在快速增长。为有效组织利用深藏于Web数据库上的信息,需对其按领域进行分类和集成。Web页面上的查询接口是网络用户访问Web数据库的唯一途径,对Deep Web数据源分类可通过对查询接口分类实现。为此,提出一种基于查询接口文本VSM(Vector Space Model)的分类方法。首先,使用查询接口文本信息构建向量空间模型,然后通过典型的数据挖掘分类算法训练分类器,从而实现对查询接口所属领域进行分类。实验结果表明给出的方法具有良好的分类性能。
To solve the shortage problem of the semantic description scope and verification capability existed in the security policy,a semantic description method for the security policy based on ontology is presented.By defining the basic elements of the security policy,the relationship model between the ontology and the concept of security policy based on the Web ontology language(OWL)is established,so as to construct the semantic description framework of the security policy.Through modeling and reasoning in the Protégé,the ontology model of authorization policy is proposed,and the first-order predicate description logic is introduced to the analysis and verification of the model.Results show that the ontology-based semantic description of security policy has better flexibility and practicality.
