@INPROCEEDINGS { Rsds4176,
author = {Stepaniuk, Jaroslaw}, 
title = {Rough Sets in Multi Relational Environment}, 
booktitle = {Procedings of the Workshop in Concurrency, Specification and Programming (CS&P'2006)}, 
series =  = {Informatik Berichte}, 
pages = {376--387}, 
publisher = {Humboldt Universitat zu Berlin}, 
address = {Berlin, Germany}, 
year = 2006, 
editor = {Lindemann, Gabriela and Schlingloff, Holger and Burkhard, Hans Dieter and Czaja, Ludwik and Penczek, Wojciech and Salwicki, Andrzej and Skowron, Andrzej and Suraj, Zbigniew}, 
abstract = {Zdzislaw Pawlak introduced approximation spaces in his work on rough sets more than two decades ago. In this paper, we show that approximation spaces are basis structures for knowledge discovery from multi-relational data. The utility of approximation spaces as fundamental objects constructed are given throughout this paper to illustrate how approximation spaces can be beneficially used in many settings.}, 
keywords = {rough sets, approximation space, multi-relational data mining, rough inclusion, uncertainty function, }, 
}