A temporally oriented data model
ACM Transactions on Database Systems (TODS)
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)
ACM SIGMOD Record
Handling infinite temporal data
Selected papers of the 9th annual ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Formal semantics for time in databases
ACM Transactions on Database Systems (TODS)
Extending the database relational model to capture more meaning
ACM Transactions on Database Systems (TODS)
Database abstractions: aggregation and generalization
ACM Transactions on Database Systems (TODS)
A query language for a homogeneous temporal database
PODS '85 Proceedings of the fourth ACM SIGACT-SIGMOD symposium on Principles of database systems
Temporal and Real-Time Databases: A Survey
IEEE Transactions on Knowledge and Data Engineering
Implementing Temporal Integrity Constraints Using an Active DBMS
IEEE Transactions on Knowledge and Data Engineering
Dealing with Temporal Schema Anomalies in History Databases
VLDB '87 Proceedings of the 13th International Conference on Very Large Data Bases
The role of time in information processing: a survey
ACM SIGMOD Record
IJCAI'85 Proceedings of the 9th international joint conference on Artificial intelligence - Volume 1
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A minimal extension of relational data model for logical modeling of the category of time in databases is offered. The time is considered as a totally ordered set. In the frame of suggested datamodel the homogeneous model of representation of time in relations is adopted. Allowing the homogeneity, the modeling of the temporal aspect of databases is achieved by means of two temporal attributes. The temporal attribute is considered as abstract data type. A formal definition of temporal relation which is based on abstraction of generalization is given. The semantics of operators update and delete is changed. A temporal algebra and calculus are developed. Also new aggregate functions are suggested considering the time aspect of the object behavior in the given enterprise. In order to give temporal integrity constrains closed formulas are used. The problems of partial support of evolution of the database schemes are considered.