Digital Discovery System (DDS)
NSDL Search API Server (prod1)

Digital Discovery System - Download

The Digital Discovery System (DDS) software is an XML repository search server that provides a search API built on top of Lucene. A DDS repository can be populated through a repository service API or by pointing it to XML files on disc. It is optimized to support the rapid construction of audience-specific portals and applications and can be flexibly configured to search over any XML structure.

This software is developed by Digital Learning Sciences at the University Corporation for Atmospheric Research with the support of the National Science Foundation.

Current version


The DDS User Forum at SourceForge is a place where users can seek advice, provide tips, share experiences, report bugs, and interact with the developers and other users of the tool. Inquiries may also be sent via e-mail to

University Corporation for Atmospheric Research (UCAR) National Science Foundation (NSF) National Science Digital Library (NSDL)