ADM: An Active Deductive XML Database System

As XML is becoming widely accepted as a mean of storing, searching and extracting information, a larger number of Web applications will require conceptual models and administrative tools to organize their collections of documents. Recently, event-condition-action (ECA) rules have been proposed to provide reactive functionality into XML document databases. However, logical inference mechanisms to deliver multiagent-based applications remain unconsidered in those models. In this paper, we introduce ADM, an active deductive XML database model that extends XML with logical variables, logical procedures and ECA rules. ADM has been partially implemented in an open distributed coordination architecture written in Java. Besides of coupling the rational and reactive behavioral aspects into a simple and uniform model, a major contribution of this work is the introduction of sequential and parallel rule composition as an effective strategy to address the problem of scheduling rule selection and execution.