Semantic database modeling: survey, applications, and research issues
ACM Computing Surveys (CSUR)
A model of multimedia information retrieval
Journal of the ACM (JACM)
Mathematical Foundations of Computer Science: Sets, Relations, and Induction
Mathematical Foundations of Computer Science: Sets, Relations, and Induction
OpenDLib: A Digital Library Service System
ECDL '02 Proceedings of the 6th European Conference on Research and Advanced Technology for Digital Libraries
Some features of the TAXIS data model
VLDB '80 Proceedings of the sixth international conference on Very Large Data Bases - Volume 6
OpenDLib: A Digital Library Service System
ECDL '02 Proceedings of the 6th European Conference on Research and Advanced Technology for Digital Libraries
Streams, structures, spaces, scenarios, societies (5s): A formal model for digital libraries
ACM Transactions on Information Systems (TOIS)
An ontology-based model of digital libraries
ICADL'05 Proceedings of the 8th international conference on Asian Digital Libraries: implementing strategies and sharing experiences
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A query language for Digital Libraries is presented, which offers access to documents by structure and sophisticated usage of meta-data. The language is based on a mathematical model of digital library documents, centered around a multilevel representation of documents as versions, views and manifestations. The core of the model is the notion of document view, which is recursive, and captures the content and structure of a document. The metadata representation distinguishes between formats and specifications, so being able to accommodate different meta-data formats, even for the same document. A query is a logical formula, and its result are the digital library documents satisfying the user query.