Access Control of XML Documents and Business Rule Processing for Advanced Information Exchange

In this paper, we summarize our research results obtained through the COE program. Our topics are classified into two categories. One is access control of XML documents, and the other is business rule processing for e-commerce. The former is dealing with various aspects of regulating access to XML documents, so that unauthorized access to data can be prevented. The latter is dealing with formal treatment of business rules for advanced automated e-commerce systems. We studied modeling and querying business rules, and extracting business rules from Web pages. We also describe two topics in more detail, one is relevancy-based access control of XML documents, and the other is extracting global policies for efficient access control of XML documents

1. Introduction

As the Internet is rapidly expanding, the landscape of social and economical activities are rapidly changing. In this paper, we describe summaries of researches conducted as a part of the 21st Century Center of Excellence Program (21st Century COE Program), Informatics Research Center for Development of Knowledge Society Infrastructure. Our focus is on developing new information exchange infrastructures for knowledge society. Our researches are categorized into two. One is access control of XML documents, and the other is business rule processing for e-commerce. XML is now regarded as a common language for information exchange on the Internet. Access control of XML documents is dealing with various aspects of regulating access, so that unauthorized access to data can be prevented. The latter is dealing with business rules on e-commerce. Formal treatment of business rules is important for advanced automated e-commerce systems. In the following, we briefly describe our research topics, classified into the above two categories.