From ideas and arguments to hyperdocuments: travelling through activity spaces
HYPERTEXT '89 Proceedings of the second annual ACM conference on Hypertext
Using an object-oriented approach to model multimedia data
Computer Communications - Multimedia communications
A theoretical underlying dual model for knowledge-based systems
ISCI '90 Proceedings of the first international conference on systems integration on Systems integration '90
What's Eliza doing in the Chinese room? Incoherent hyperdocuments—and how to avoid them
HYPERTEXT '91 Proceedings of the third annual ACM conference on Hypertext
A transaction model for an open publication environment
Database transaction models for advanced applications
Structure and semantics in OODB class specifications
ACM SIGMOD Record
Semantic vs. structural resemblance of classes
ACM SIGMOD Record
Equality testing for complex objects based on hashing
Data & Knowledge Engineering
PODS '90 Proceedings of the ninth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Object Class Definition by Generalization Using Upward Inheritance
Proceedings of the Fourth International Conference on Data Engineering
ViewSystem: Integrating Heterogeneous Information Bases by Object-Oriented Views
Proceedings of the Sixth International Conference on Data Engineering
Serializability in Object-Oriented Database Systems
Proceedings of the Sixth International Conference on Data Engineering
Atomic Commitment for Integrated Database Systems
Proceedings of the Seventh International Conference on Data Engineering
Dynamic Derivation of Personalized Views
VLDB '88 Proceedings of the 14th International Conference on Very Large Data Bases
Schema Independent Query Formulation
Proceedings of the Eight International Conference on Enity-Relationship Approach to Database Design and Querying
Eine Systemarchitektur für ein wissensbasiertes Hypertext-Autorensystem
Hypertext und Hypermedia: Von theoretischen Konzepten zur praktischen Anwendung
The V3 video server--managing analog and digital video clips
SIGMOD '93 Proceedings of the 1993 ACM SIGMOD international conference on Management of data
VODAK open nested transactions—visualizing database internals
SIGMOD '93 Proceedings of the 1993 ACM SIGMOD international conference on Management of data
Application Specific Transaction Management in MultidatabaseSystems
Distributed and Parallel Databases
Document Management as a Database Problem
VLDB '95 Proceedings of the 21th International Conference on Very Large Data Bases
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At the Integrated Publication and Information Systems Institute (IPSI) of the GMD (Gesellschaft für Mathematik und Datenverarbeitung) database research is focused towards distributed database management systems to support the integration of heterogeneous multi-media information bases needed in an integrated publishing environment. The objective is to investigate advanced object-oriented and active data modelling concepts together with the principles of distributed data stores and data management. The unifying basis for the database research is the object-oriented data model VML developed in the project VODAK over the last four years. The data model is based on recursively defined meta classes, classes and instance hierarchies paired with a strict separation of structural and operational definitions in a polymorphic type system.This report describes the highlights of the work on the VODAK database system, the research efforts in heterogeneous database integration and the research plans of the multimedia database project as well as applications of our system in different environments such as hypertext and office automation.