RTL a Relation and Table Language for statistical databases

Abstract

In this paper, we present a multidimentional data language-RTL (Relation and Table Language) allowing statisticans to handle micro and macro statistical databases. We first describe our data model for statistical applications, based upon a twofold structure : relation and Complex Statistical Table (CST). Then, we present RTL, that encompasses relational algebra with aggregate operator, transformation operators, in order to achieve conversion between relations and CSTs, and specific CST-manipulation operators, allowing to modify CST organization (and making this data-structure dynamic) or to aggregate macro-data.