A threshold selection language

Abstract

This paper is concerned with a technique which, unlike Boolean-based methods, allows the selecting function to be specified in an intuitive manner, regardless of the complexity of the criteria, where Boolean statements might become quite awkward and lose all but their formal meaning. In order to describe this technique concisely, we find it convenient to introduce a modest amount of formalism to give our description a solid grounding. This process has begun above and will be completed in the next section.