Dryad is a repository for data underlying scientific literature. Dryad allows investigators to validate published findings, explore new analysis methodologies and repurpose the data for research questions unanticipated by the original authors.  The core code of Dryad comes from the DSpace repository software. Developers using the Dryad code should first familiarize themselves with DSpace.  Documentation specific to the Dryad codebase can be found in the Dryad wiki.