National Science Digital Library

Link: http://www.nsdl.org

• SMET Disciplines (Science, Mathematics, Engineering, Technology)
• Educational focus
• Collections linked by services, standards and policies
  • Metadata
  • Federated Search (OAI)

NSDL Metadata Management: http://metamanagement.comm.nsdl.org/cgi-bin/wiki.pl
NSDL Search & Discovery: http://search.comm.nsdl.org/cgi-bin/wiki.pl?Search_and_Discovery
NSDL Communications Portal (for policies & information): http://comm.nsdl.org

(Architectural diagram from Introduction to NSDL SDS Services)