Thomi Pilioura Georgios-Dimitrios Kapos Aphrodite Tsalgatidou PYRAMID-S: A Scalable Infrastructure for Semantic Web Service Publication and Discovery. 15-22 2004 conf/ride/2004 RIDE http://csdl.computer.org/comp/proceedings/ride/2004/2095/00/20950015abs.htm db/conf/ride/ride2004.html#PiliouraKT04