The NASA Astrophysics Data System: Architecture Alberto Accomazzi, Guenther Eichhorn, Michael J. Kurtz, Carolyn S. Grant and Stephen S. Murray Astron. Astrophys. Suppl. Ser., 143 1 (2000) 85-109 Published online: 15 April 2000 DOI: 10.1051/aas:2000172