This paper provides a systematic and comprehensive study of the underlying semantics of
temporal databases, summarizing the results of an intensive collaboration between the two …

• Bases de datos relacionales (Capítulos 4 al 7). El Capítulo 4 se centra en el lenguaje
relacional orientado al usuario de mayor influencia: SQL. El Capítulo 5 cubre otros dos …

Recently, attention has been focused on temporal databases, representing an enterprise
over time. We have developed a new language, Tquel, to query a temporal database. TQuel …

In a temporal database, time values are associated with data item to indicate their periods of
validity. We propose a model for temporal databases within the framework of the classical …

Technology is constantly changing; what is cutting edge today is obsolete tomorrow. In this
ever-evolving environment, educators, researchers and professionals of the discipline need …

In this work we survey the research on foundations of data-aware (business) processes that
has been carried out in the database theory community. We show that this community has …

Temporal logic, often used as a specification language for programs, can serve directly as a
programming language. We propose a specific programming language TEMPLOG, which …

To add time support to the relational model, both first normal form (1NF) and non-1NF data
models have been proposed. Each has associated advantages and disadvantages. For …

This chapter introduces a new approach to temporal extensions of SQL. In contrast with most
of the current proposals we use single time points as references to time, while still achieving …

The association of timestamps with various data items such as tuples or attribute values is
fundamental to the management of time varying information. Using intervals in timestamps …