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The National STEM Distributed Learning (NSDL) program is a national network dedicated to advancing STEM teaching and learning for all learners in both formal and informal settings.
DLF Aquifer Development for Interoperability Across Scholarly Repositories: American Social History Online will implement schemas, data models and technologies to enable scholars to use distributed digital collections in a variety of local environments.
This is attempt to make an open source bookmarking system that supports tagging, distributed data storage, genetic "splicing" of strains of bookmarking tags and much more!
Herdin Networks of Networks (NeoN) is a system and database that enables online exchange of information and allows distributed knowledge repository network.
It links 3 major database: researches/projects, authors/experts, and institutions.
ISpheres provide distributed interoperable metadata & digital object services. Each ISphere can publish multiple heterogeneous collections of digital objects (eg images, GIS data, etc) search other ISpheres, translate metadata, transform & serve objects.
The OpenOGI project is an open source library to integrate heterogeneous and distributed geographic objects (features) based on ontology and OGC WFS specification. This library is an open academic tool.