NSDL An update on the National Science Digital Library “Resources for In-Depth Learning” Funded by the National Science Foundation Education & Human Resources Directorate For the DLESE Steering Committee Ithaca, NY, 2 July 2002, by Dave Fulker University Corp for Atmospheric Research Toward a Content Philosophy Principles of academic freedom and learner discovery Acessioning at the collection level, for scalability Accessioning priorities set with stakeholder representatives, with goals of breadth, depth, & educational value De-accessioning (rare) under guidelines set by a board of experts in library principles Educational value, relative to age-specific and other contexts, to be manifest in capabilities for annotation and selective filtering, rather than an accession threshhold 2