In the past, applied artificial intelligence systems were built with particular emphasis on general reasoning methods intended to function efficiently, even when only relatively little domain-specific knowledge was available. In other words, AI technology aimed at the processing of knowledge stored under comparatively general representation schemes. Nowadays, the focus has been redirected to the role played by specific and detailed knowledge, rather than to the reasoning methods themselves. Many new application systems are centered around knowledge bases, i. e., they are based on large collections offacts, rules, and heuristics that cap ture knowledge about a specific domain of applications. Experience has shown that when used in combination with rich knowledge bases, even simple reasoning methods can be extremely effective in a wide variety of problem domains. Knowledge base construction and management will thus become the key factor in the development of viable knowledge-based ap plications. Knowledge Base Management Systems (KBMSs) are being proposed that provide user-friendly environments for the construction, retrieval, and manipUlation of large shared knowledge bases. In addition to deductive reasoning, KBMSs require operational characteristics such as concurrent access, integrity maintenance, error recovery, security, and perhaps distribution. For the development ofKBMSs, the need to integrate concepts and technologies from different areas, such as Artificial Intel ligence, Databases, and Logic, has been widely recognized. One of the central issues for KBMSs is the framework used for knowledge representation-semantic networks, frames, rules, and logics are proposed by the AI and logic communities."

This book constitutes the thoroughly refereed post-proceedings of the First International Conference on Digital Libraries, DELOS 2007, held in Pisa, Italy, in February 2007.

The 33 revised full papers presented were carefully reviewed and selected during two rounds of reviewing and improvement for inclusion in the book. The papers are organized in topical sections on similarity search, architectures, personalization, interoperability, evaluation, miscellaneous, preservation, video data management, 3D objects, and peer to peer.

This book constitutes the refereed proceedings of the 6th European Conference on Research and Advanced Technology for Digital Libraries, ECDL 2002, held in Rome, Italy, in September 2002.The revised 42 full and 6 short papers presented together with 6 posters and demo descriptions were carefully reviewed and selected from 145 submissions. The papers are organized in topical sections on web archiving, e-book, collection building, web technologies, OAI approaches, case studies, navigation and query language, audio/video retrieval, architecture, information retrieval, evaluation, multimedia and mixed media, preservation and classification, user studies, humanities, and demos and posters.

This book constitutes the refereed proceedings of the First European Conference on Research and Advanced Technology for Digital Libraries held in Pisa, Italy, in September 1997.
The volume presents 23 revised full papers selected from 77 submissions. Also included are two invited contributions. The papers are organized in topical sections on supporting user interfaces, metadata, information retrieval, DL architectures, multilingual information retrieval, structured documents, and case studies.

Database technology is currently being pushed by the needs of new applications and pulled by the oppor- tunities of novel developments in hardware and systems architecture. The invited paper, two panel sessions and 27 papers in this volume report on how the technology is currently extending. One broad area covered is extended database semantics, including data models and data types, databases and logic, complex objects, and expert system approaches to databases. The other area covered is raw architectures and increased database systems support, including novel transaction models, data distribution and replication, database administration, and access efficiency.