Ewa Deelman Gurmeet Singh Malcolm P. Atkinson Ann L. Chervenak Neil P. Chue Hong Carl Kesselman Sonal Patil Laura Pearlman Mei-Hui Su Grid-Based Metadata Services. 393-402 2004 conf/ssdbm/2004 SSDBM http://doi.ieeecomputersociety.org/10.1109/SSDBM.2004.39 db/conf/ssdbm/ssdbm2004.html#DeelmanSACHKPPS04