Finite representation of infinite query answers
ACM Transactions on Database Systems (TODS)
Handling infinite temporal data
Selected papers of the 9th annual ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
On periodicity in temporal databases
Information Systems
On the analysis of indexing schemes
PODS '97 Proceedings of the sixteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Designing access methods for bitemporal databases
Designing access methods for bitemporal databases
An extensible notation for spatiotemporal index queries
ACM SIGMOD Record
SIGMOD '85 Proceedings of the 1985 ACM SIGMOD international conference on Management of data
Comparison of access methods for time-evolving data
ACM Computing Surveys (CSUR)
Developing time-oriented database applications in SQL
Developing time-oriented database applications in SQL
The TSQL2 Temporal Query Language
The TSQL2 Temporal Query Language
Time Granularities in Databases, Data Mining and Temporal Reasoning
Time Granularities in Databases, Data Mining and Temporal Reasoning
Symbolic representation of user-defined time granularities
Annals of Mathematics and Artificial Intelligence
An Algebraic Representation of Calendars
Annals of Mathematics and Artificial Intelligence
Temporal and Real-Time Databases: A Survey
IEEE Transactions on Knowledge and Data Engineering
Hashing Methods for Temporal Data
IEEE Transactions on Knowledge and Data Engineering
Symbolic User-Defined Periodicity in Temporal Relational Databases
IEEE Transactions on Knowledge and Data Engineering
Managing Intervals Efficiently in Object-Relational Databases
VLDB '00 Proceedings of the 26th International Conference on Very Large Data Bases
Generalized Search Trees for Database Systems
VLDB '95 Proceedings of the 21th International Conference on Very Large Data Bases
Object-Relational Indexing for General Interval Relationships
SSTD '01 Proceedings of the 7th International Symposium on Advances in Spatial and Temporal Databases
DEXA '98 Proceedings of the 9th International Conference on Database and Expert Systems Applications
IEEE Transactions on Knowledge and Data Engineering
A Lattice of Classes of User-Defined Symbolic Periodicities
TIME '04 Proceedings of the 11th International Symposium on Temporal Representation and Reasoning
Mapping Calendar Expressions into Periodical Granularities
TIME '04 Proceedings of the 11th International Symposium on Temporal Representation and Reasoning
A flexible approach to user-defined symbolic granularities in temporal databases
Proceedings of the 2005 ACM symposium on Applied computing
A mathematical framework for the semantics of symbolic languages representing periodic time
Annals of Mathematics and Artificial Intelligence
Artificial Intelligence in Medicine
Extending temporal databases to deal with telic/atelic medical data
Artificial Intelligence in Medicine
A modular approach to user-defined symbolic periodicities
Data & Knowledge Engineering
Adopting model checking techniques for clinical guidelines verification
Artificial Intelligence in Medicine
Encyclopedia of Database Systems
Encyclopedia of Database Systems
Verification of temporal scheduling constraints in clinical practice guidelines
Artificial Intelligence in Medicine
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Context: Temporal information plays a crucial role in medicine, so that in medical informatics there is an increasing awareness that suitable database approaches are needed to store and support it. Specifically, a great amount of clinical data (e.g., therapeutic data) are periodically repeated. Although an explicit treatment is possible in most cases, it causes severe storage and disk I/O problems. Objective: In this paper, we propose an innovative approach to cope with periodic relational medical data in an implicit way. Methods: We propose a new data model, representing periodic data in a compact (implicit) way, which is a consistent extension of TSQL2 consensus approach. Then, we identify some important types of temporal queries, and present query answering algorithms to answer them. Finally, we also run experiments to evaluate our approach. Results: The experiments show that our approach outperforms current explicit approaches, especially as regard disk I/O. Conclusion: We have provided an implicit approach to periodic data with is a consistent extension of TSQL2 (and which is thus grant interoperable with it), and we have experimentally proven that it outperforms current explicit approaches.