20.500.12556/DKUM-20728 Integracija podatkovnih virov na osnovi ontologij s semantično označenimi storitvami Ontology based information integration using semantically annotated services Količina informacij, ki jih hranimo v različnih informacijskih sistemih, raste eksponentno. Ključni izziv, ki se poraja v obdobju vse večje informacijske zasičenosti, je kako na čim bolj učinkovit način obvladovati ter združevati informacije, ki so porazdeljene med heterogenimi podatkovnimi viri. V okviru doktorske disertacije smo razvili pristop, ki omogoča za uporabnika transparentno integracijo heterogenih podatkovnih virov na osnovi ontologij. Inovativnost pristopa predstavlja uporaba storitev v vlogi podatkovnih virov. Storitve so označene s semantičnimi opisi, ki omogočajo samodejno odkrivanje, kompozicijo ter proženje storitev. Takšen pristop omogoča integracijo praktično kateregakoli podatkovnega vira z uporabo odprtih in standardiziranih tehnologij. Ključni prispevki našega raziskovalnega dela so formalni model za integracijo s semantično označenimi storitvami ter algoritmi za distribuirano povpraševanje po podatkih, ki jih zagotavljajo storitve. Na osnovi definiranega modela in algoritmov smo razvili prototip ter izvedli eksperiment, kjer smo razviti prototip primerjali s standardnimi pristopi za delo s semantično označenimi podatki. Na osnovi rezultatov eksperimenta smo izvedli statistično analizo. Rezultati statistične analize so pokazali, da je razvit prototip učinkovitejši od primerjanih pristopov. Razviti prototip se po učinkovitosti signifikantno ne razlikuje le od dveh najbolj učinkovitih pristopov. Na podlagi izvedene raziskave, lahko sklenemo, da uporaba semantično označenih storitev za integracijo podatkovnih virov na osnovi ontologij izboljša fleksibilnost in nima negativnega vpliva na učinkovitost. 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 efficient way to manage and integrate the information that is distributed among heterogeneous 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 our approach 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 our research 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 of the 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. Integracija podatkov semantična integracija ontologija storitveno orientirana arhitektura semantične storitve Information integration semantic integration ontology service oriented architecture semantic services true true false [B. Grašič] Slovenski jezik Angleški jezik Doktorska disertacija 2011-09-29 02:19:21 2011-09-30 10:37:48 2022-04-14 08:12:29 2023-12-26 03:18:08 2011 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 004.62:004.775(043.3) 15366422 URN:SI:UM:DK:3K1BNLPF DR_Grasic_Bostjan_2011.pdf DR_Grasic_Bostjan_2011.pdf 1 ABC806925A73B3265AB49573B59A4E72 b470d2cd9e00d159c109cb2c2ac660f1fbe383338aa05f1a60573136cec43f7f b02e9ccb-7c05-11eb-bb7a-00155d0001ca 20.500.12556/dkum/ec86ef05-534f-4a01-8272-e73dfb5f73ce https://dk.um.si/Dokument.php?lang=slv&id=25883 Fakulteta za elektrotehniko, računalništvo in informatiko 0 0 0