NSDL Documentation Wiki

Announcement: The operation of NSDL has been transferred to ISKME's OER Commons (effective December, 2014) - Read the news release.

This documentation describes the policies, procedures, and services that existed while NSDL was operated by UCAR.

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  • Technical Overview

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NSDL also produces Open Source Software products that aid in indexing, creating, and consuming digital library collections and other content. These include the NSDL Digital Collection System (NCSDCS), jOAI, and Digital Discovery System (DDS).


The NSDL repository contains collections of resource metadata, annotations, use data/paradata, and a collection of collection metadata (metadata about the collections). Collections are ingested into the repository from partners via OAI-PMH or are managed directly through the NSDL Collections System. Once in the repository, collections and records are made available through the Search API and the NSDL OAI data provider and are published to the Learning Registry. In addition, the Strand Map Service APIs provide access to AAAS Benchmarks, Maps and visualizations. Developers can use the Search API, SMS APIs and OAI data provider to search and browse a wide range of educational resources and to build innovative applications that support teaching and learning. The diagram below shows an overview of the NSDL technical platform.