  The XMM-NEWTON Science Archive (XSA) is being developed within the XMM-NEWTON
Science Operations Centre at the ESA VILSPA Satellite Tracking Station of
Villafranca del Castillo, near Madrid in Spain. The first public version was
released on April 15, 2002.
  Based on the ISO Data Archive architecture and design, the XSA is accessible
from the World Wide Web through a Java interface at
http://xmm.vilspa.esa.es/xsa that allows: - powerful and complex queries
against the observations and exposure catalogue for the first release and
against the source catalogue in future releases - configurable results display,
including product visualization tools - customisable product retrieval via a
shopping basket - selection of product level - product retrieval via FTP or
CDROM - proprietary rights protection for both display and data request
  The XSA will also be ready to provide inter-operability with other archives
and applications.
