A MULTIAGENT UPDATE PROCESS IN A DATABASE WITH TEMPORAL DATA DEPENDENCIES AND SCHEMA VERSIONING

Temporal data dependencies are high-level linguistic constructs that d efine relationships among values of data-elements in temporal database s. These constructs enable the support of schema versioning as well as the definition of consistency requirements for a single time-point an d among values in different time-points. In this paper, we present a m ultiagent update process in a database with temporal data dependencies and schema versioning. The update process supports the evolution of d ependencies over time and the use of temporal operators within tempora l data dependencies. The temporal dependency language is presented, al ong with the temporal dependency graph-which serves as the executable data structure. A thorough discussion of the feasibility, performance, and consistency of the presented model is provided.