Interoperability Of Heterogeneous Systems Research Articles

Towards effective GML data management: framework and prototype

Geography Markup Language (GML) is composed of non-spatial information as properties of geographical features and spatial information as geometry. With the feature of XML-encoding and well-formed specification, GML has been widely used in various application systems as internal representation of geo-spatial data for its efficient interoperability in heterogeneous systems. This arises the demand to effectively manipulate GML data. The separate GML processing technology cannot provide a whole geo-spatial data management service for users. In this paper, we propose a GML data management framework and analyse how the relative technologies cooperate to meet the demand of geo-spatial data representing, processing and exchanging. Storage, index and query approaches, and corresponding integration technology are presented based on the proposed framework. The prototype of GML data management system (GDMS) was implemented based on the proposed framework.

Knowledge portal construction and resources integration for a large scale hydropower dam

AbstractBased on the research project entitled ‘Data Collection and Decision Support System for Hydropower Dam Construction’ sponsored by the National Development and Reform Commission of China, this paper puts forward a multilayer architecture and a support system for the knowledge portal utilizing web services and J2EE while offering a method for integrating existing resources. The purpose for this system is to help the China Gezhouba Group Corporation (CGGC) manage the construction of a large‐scale hydropower dam. Through the interoperability in distributed environment, software integration technology and heterogeneous system integration, the interoperability of heterogeneous systems is realized by the enterprise application integration (EAI). In this project, an open and unified integration environment is provided by the analytic system (AS), making it possible for all kinds of software resources to be made readily accessible. Copyright © 2009 John Wiley & Sons, Ltd.

An information retrieval approach to ontology mapping

In this paper, we present a heuristic mapping method and a prototype mapping system that support the process of semi-automatic ontology mapping for the purpose of improving semantic interoperability in heterogeneous systems. The approach is based on the idea of semantic enrichment, i.e., using instance information of the ontology to enrich the original ontology and calculate similarities between concepts in two ontologies. The functional settings for the mapping system are discussed and the evaluation of the prototype implementation of the approach is reported.

Providing Security and Interoperation of HeterogeneousSystems

Interoperation and information sharing among databases independently developed and maintained by different organizations is today a pressing need, if not a practice. Governmental, military, financial, medical, and private institutions are more and more required to become part of a distributed infrastructure and selectively share their data with other organizations. This sharing process inevitably opens the local system to new vulnerabilities and enlarges the space of possible threats to the data and resources it maintains. As a complicating factor, in general, data sources are heterogeneous both in the data models they adopt and in the security models by which protection requirements are stated. We present a modeling and architectural solution to the problem of providing interoperation while preserving autonomy and security of the local sources based on the use of wrappers and a mediator. A wrapper associated with each source provides a uniform data interface and a mapping between the source's security lattice and other lattices. The mediator processes global access requests by interfacing applications and data sources. The combination of wrappers and mediator thus provides a uniform data model interface and allows the mapping between restrictions stated by the different security policies. We describe the practical application of these ideas to the problem of trusted interoperation of health care databases, targeted to enforcing security in distributed applications referring to independent heterogeneous sources protected by mandatory policy restrictions. We describe the architecture and operation of the system developed, and describe the tasks of the different components.