The relational model with relation-valued attributes
Information Systems
The temporal query language TQuel
ACM Transactions on Database Systems (TODS)
Adding time dimension to relational model and extending relational algebra
Information Systems
A homogeneous relational model and query languages for temporal databases
ACM Transactions on Database Systems (TODS)
SIGMOD '89 Proceedings of the 1989 ACM SIGMOD international conference on Management of data
Temporal databases: theory, design, and implementation
Temporal databases: theory, design, and implementation
Unifying temporal data models via a conceptual model
Information Systems
SIGMOD '85 Proceedings of the 1985 ACM SIGMOD international conference on Management of data
On an algebra for historical relational databases: two views
SIGMOD '85 Proceedings of the 1985 ACM SIGMOD international conference on Management of data
PDIS '94 Proceedings of the third international conference on on Parallel and distributed information systems
Object-Relational DBMSs: Tracking the Next Great Wave
Object-Relational DBMSs: Tracking the Next Great Wave
Extensions to SQL for Historical Databases
IEEE Transactions on Knowledge and Data Engineering
The Expressive Power of Temporal Relational Query Languages
IEEE Transactions on Knowledge and Data Engineering
Temporal Relational Data Model
IEEE Transactions on Knowledge and Data Engineering
Relational Database Systems with Zero Information Loss
IEEE Transactions on Knowledge and Data Engineering
The Historical Relational Data Model (HRDM) and Algebra Based on Lifespans
Proceedings of the Third International Conference on Data Engineering
The time relational model
An extension of relational algebra for summary tables
SSDBM'83 Proceedings of the 2nd international workshop on Proceedings of the Second International Workshop on Statistical Database Management
Data & Knowledge Engineering
TempoXML: Nested bitemporal relationship modeling and conversion tool for fuzzy XML
Information Sciences: an International Journal
Recursive natural join operation in bitemporal nested relations
International Journal of Intelligent Information and Database Systems
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We introduce a nested bitemporal relational data model that allows arbitrary levels of nesting. Bitemporal data is attached to attributes. The fundamental construct for representing temporal data is a bitemporal atom that consists of three parts: transaction time, valid time and a value. We have defined algebra for the nested bitemporal relational model. The algebra includes operations to manipulate bitemporal data, to restructure nested bitemporal relations and to rollback database to a designated state in the past. We have also defined the concept of ‘context' for using temporal data. Bitemporal context is for auditing purposes and rollback context is for querying past states of a bitemporal database.