@INPROCEEDINGS { Rsds4870,
author = {Polkowski, Lech T. and Semeniuk-Polkowska, Maria}, 
title = {On Intensional Aspects of Concepts Defined in Rough Set Theory}, 
booktitle = {Proceedings of the Workshop on Concurrency, Specification and Programming (CS&P'2009)}, 
volume = 2, 
pages = {486--497}, 
publisher = {Warsaw University}, 
address = {Warsaw, Poland}, 
month = {September}, 
year = 2009, 
editor = {Czaja, Ludwik and Szczuka, Marcin}, 
isbn = {978-83-927816-1-5}, 
abstract = {Intensionality is bound to global mappings from sets of possible worlds to truth states relative to a set of predicates, witness schemes like Montague Grammar. We discuss this aspect in the frame of rough set theory where concepts arise as collections of objects constrained by bounds on values of chosen sets of attributes. We apply the idea of a rough inclusion as similarity measure for objects, and rough inclusions measure truth state values of predicates relative to possible worlds granules of objects.}, 
keywords = {rough sets, granulation of knowledge, rough mereology, logics for reasoning about knowledge, }, 
}