This book constitutes the refereed proceedings of the International Conference on Theory and Practice of Digital Libraries, TPDL 2013 (formerly European Conference on Research and Advanced Technology for Digital Libraries, ECDL) held in Valletta, Malta, in September 2013. The 24 full papers, 13 short papers, 22 posters and 8 demonstrations presented in this volume were carefully reviewed and selected from 158 submissions. The papers cover a wide range of research topics, clustered in four broader areas: foundation, infrastructures, content, and services. They have been organized in topical sections on conceptual models and formal issues, aggregation and archiving, user behavior, digital curation, mining and extraction, architectures and interoperability, interfaces to digital libraries, semantic web, information retrieval and browsing, and preservation. Also included are 6 tutorials and 2 panels.

This book constitutes the proceedings of the 23rd International Conference on Theory and Practice of Digital Libraries, TPDL 2019, held in Olslo, Norway, in September 2019. The 16 revised full papers,12 short papers and 18 poster papers presented were carefully reviewed and selected from 75 submissions. The general theme of TPDL 2019 was Connecting with Communities and so the papers attempt to facilitate establishing connections and convergences between diverse research communities such as Digital Humanities, Information Sciences and others that could benefit from ecosystems offered by digital libraries and repositories. To become especially useful to the diverse research and practitioner communities digital libraries need to consider special needs and requirements for effective data utilization, management and exploitation.