We are pleased in this issue to present extended and enhanced versions of four award-nominated papers from the 2016 ACM/IEEE-CS Joint Conference on Digital Libraries (JCDL ’16). JCDL ’16 was held on the campus of Rutgers University–Newark and is the sixteenth in the series of conferences jointly sponsored by the Association for Computing Machinery and the IEEE Computer Society. The location is particularly notable since it also was one of the homes of one of the two conference series that merged to create JCDL—the IEEECS Advances in Digital Libraries. (The other conference was ACM Digital Libraries.) Thus, JCDL ’16 reflects both the enormous advancement adoption and that have occurred to date in digital libraries, but also the novel, multidisciplinary, and dynamic research issues that they continue to engender. JCDL can lay claim to being the preeminent academic conference for digital library research and so the papers in this issue reflect the best of what already is a highly selective group. JCDL papers are submitted in complete and finished form and are evaluated carefully by the conference’s program committee. Only 29% of the full paper submissions were selected for inclusion in the conference. A smaller group of papers were identified from the conference’s papers as candidates for one of the conference’s two full paper awards—papers selected either were specifically recommended by program committee members and/or were ones receiving the most positive reviews. Those authors were then invited to submit extended versions of their contributions to this journal. These submissions were reviewed again using the normal procedures of the journal, a process potentially requiring revision and re-review, and ultimately were accepted for publication. The four papers that were accepted for inclusion in this issue are:

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关于2016年ACM / IEEE-CS数字图书馆联合会议JCDL 2016焦点问题的介绍

我们很高兴在本期中展示2016年ACM / IEEE-CS数字图书馆联合会议（JCDL '16）的四篇获奖论文的扩展和增强版本。JCDL '16在罗格斯大学纽瓦克分校的校园举行，这是由计算机协会和IEEE计算机协会联合主办的系列会议中的第16场。该位置特别引人注目，因为它也是合并创建JCDL的两个会议系列之一（IEEECS数字图书馆的发展）之一。（另一个会议是ACM数字图书馆。）因此，JCDL '16既反映了数字图书馆的巨大采用和迄今为止的发展，也反映了它们继续引起的新颖，多学科和动态的研究问题。JCDL可以声称是数字图书馆研究的杰出学术会议，因此，本期的论文反映了已经高度精挑细选的小组中的佼佼者。JCDL论文以完整和完成的形式提交，并由会议计划委员会进行仔细评估。只有29％的论文全文被选入会议。从会议论文中选出的一小部分论文是会议两个完整论文奖之一的候选人-选出的论文是计划委员会成员特别推荐的和/或获得最积极评价的论文。然后邀请这些作者向该期刊提交其文稿的扩展版本。这些稿件按照期刊的常规程序再次进行了审核，一个可能需要修订和重新审核的过程，最终被接受发布。本期被收录的四篇论文是：