A study of various techniques for storing inhomogeneous descriptive data of digital maps

In contemporary Geographical Information Systems (GIS) the large variety of digital map sources requires the handling and storing of various descriptive data in a single storage facility. Although the number and type of attributes can vary among different maps, the storage of such inhomogeneous data in a single database is difficult, as querying is an essential task and requires fast retrieval of data based on any present attribute.In this study, the authors compare three different approaches to this problem based on relational and objectoriented database systems by implementing and testing with massive inhomogeneous and altering descriptive data. Since this problem is not only typical in the field of GIS, the solution can be applied generally to any domain using inhomogeneous data, like e-commerce systems and document warehouses

AMNIS - DESIGN AND IMPLEMENTATION OF AN ADAPTIVE WORKFLOW MANAGEMENT SYSTEM

The experiences of introduction and operation of ERP systems have revealed that update of these software due to the constantly changing business processes demand huge resources. That is why the demand was formulated for a method that enables introducing new features in software system without any modification in program code according to the evolution of the organization. The objective of Amnis development project is to create a system with this adaptation capability using the basic idea of workflows that create documents during evaluation. In this article design and programming challenges are shown that had to be met during the development of Amnis, focusing on topics of effective data storage and queries, workflow control structures and workflow evaluation techniques