Samir Abdel-Moneim, MohamedHamed El-Bastawissy, AliHamed Kholief, Mohamed2020-02-032020-02-0320152221-0741https://cutt.ly/krI05AYMSA Google ScholarData integration systems (DIS) are systems where query answers are collected from a set of heterogeneous and autonomous data sources. Data integration systems can improve results by detecting the quality of the data sources and retrieve answers from the significant ones only. The quality measures of the data in the data sources not only help in determining the significant data sources for a given querybut also help data integration systems produce results in a reasonable amount of time and with less errors.In this paper, we perform an experiment that shows a mechanism used to calculate and store a set of quality measures on data sources. The quality measures are,then,interactively used in selecting the most significant candidates of data sources to answerusers’queries. The justification and evaluations are done using amalgam and THALIAbenchmarks. We show that our approach dramatically improves query’s answersenOctober University for University for componentdata integrationquality measuresdata sourcesquery answers;user preferencesArticle