Virginia Tech. Department of Computer Science. Digital Library Research LaboratoryMurthy, UmaGorton, DouglasTorres, Ricardo da SilvaGoncalves, Marcos A.Fox, Edward A.Delcambre, Lois M. L.2015-05-282015-05-282007-06-23Murthy, Uma, Douglas Gorton, Ricardo Torres, Marcos A. Goncalves, Edward A. Fox, Lois Delcambre. Extending the 5S Digital Library (DL) Framework: From a Minimal DL towards a DL Reference Model. 2007. Paper presented at the First Digital Library Foundations Workshop - held in conjunction with the 2007 Joint Conference on Digital Libraries (Vancouver, Canada, June 18-24, 2007).http://hdl.handle.net/10919/52770In this paper, we describe ongoing research in three DL projects that build upon a common foundation: the 5S DL framework. In each project, we extend the 5S framework to provide specifications for a particular type of DL service and/or system - finally, moving towards a DL reference model. In the first project, we are working on formalizing content-based image retrieval services in a DL. In the second project, we are developing specifications for a superimposed information-supported DL (combining annotation, hypertext, and knowledge management technologies). In the third effort, we have used the 5S framework to generate a practical DL system based on the DSpace software.6 pagesapplication/pdfen-USIn CopyrightDigital librariesReference modelsConference proceedinghttp://www.dlib.vt.edu/projects/5S-Model/extending5S.pdf