Integracija podatkovnih virov na osnovi ontologij s semantično označenimi storitvami : doktorska disertacija

slovenian

doktorska dela

2011

Univerza v Mariboru, Fakulteta za elektrotehniko računalništvo in informatiko

We are living in a period of increasing saturation of information. The amount of information stored in different information systems is still growing exponentially. In this manner, the key challenge is to find the most efficientway to manage and integrate the information that is distributed amongheterogeneous data sources. In this dissertation we have developed a mediator based information integration approach, allowing users transparent integration of heterogeneous data sources using ontologies. The novelty of ourapproach is the use of services as data providers. Services are annotated with semantic descriptions that enable automated discovery, composition and service invocation. This approach allows integration of practically any data source using open and standardized technologies. The key contributions of ourresearch work are a formal model for information integration using semantically annotated services, and algorithms for querying distributed data sources, where services are used as data providers. We have developed a prototype based on the developed model and algorithms. Using this prototype, we have evaluated our approach by comparing it to existing approaches and technologies. Statistical analysis has been performed based on the results ofthe experiment. The analysis proved that the prototype is more efficient than the compared approaches. The prototype efficiency does not differ significantly only from two most efficient approaches. Based on the conducted research, we can conclude that using services as data providers for ontology based information integration improves flexibility and does not have a negative impact on efficiency.

07.08.2023