Welcome to this special issue of the International Journal of Digital Libraries (IJDL) to feature the winners and the runners-up in the Vannevar Bush best paper, and the best student paper of the Joint Conference on Digital Libraries (JCDL) 2011 held in Ottawa, Canada, in June 2011. The Editors in Chief of IJDL extended an invitation to the winners and runners-up to submit extended versions of their JCDL 2011 papers. This special issue contains those papers. The ACM/IEEE Joint Conference on Digital Libraries is a major international annual forum focusing on digital libraries and associated technical, practical, organizational, and social issues. The 2011 conference theme was ”Digital Libraries: Bringing Together Scholars, Scholarship and Research Data”, in recognition of the changes the digital age is now bringing to scholarship. The conference featured 28 full and 29 short technical papers that had gone through a rigorous peer review along with posters, tutorials, demonstrations and workshops. The JCDL program committee nominates papers they consider highlight work of significance in the field, and those are then reviewed again by an awards sub-committee. The invited authors submitted new versions of their papers that expanded upon the description of their work through providing more detail on their approaches and results. In each case, the papers provide more depth on the technical approach, and more detail on their results. The submissions went through the IJDL review process before acceptance to
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