The category concept: an extension to the entity-relationship model
Data & Knowledge Engineering
The temporal query language TQuel
ACM Transactions on Database Systems (TODS)
A homogeneous relational model and query languages for temporal databases
ACM Transactions on Database Systems (TODS)
A generalized model for a relational temporal database
SIGMOD '88 Proceedings of the 1988 ACM SIGMOD international conference on Management of data
Fundamentals of database systems
Fundamentals of database systems
A temporal relational model and a query language
Information Sciences: an International Journal
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
Modelling the Time Dimension in an Entity-Relationship Diagram
Proceedings of the Fourth International Conference on Entity-Relationship Approach
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Recently there has been tremendous interest in temporal data modeling. The scope of most proposed temporal models has been restricted to historical, or past data. We believe that a complete temporal database must deal with historical data as well as data relating to the future (pending data). In this paper we expand the previous work on temporal modeling by introducing the 'pending' dimension. We also specify a (pending) query and update language, which is an extension of the GORDAS ER query language. We use an inventory management environment and show that our model and query language can handle complex pending situations.