The zero array:: A twilight zone

Descriptive knowledge about a multivalued data table or Object Attribute Table can be expressed by means of a binary Boolean based language. Efforts to design computer programs that determine declarations have been made. This endeavor is mainly directed to binary declarations. This paper firstly proposes a multivalued languaje, based on arrays, that allows a multivalued description of the knowledge contained in a data table, by means of array expressions. The zero array is singled out and its interpretation analyzed, following the discussion the projection arrays or projeact-ars are introduced. Finally, a relation between formal concepts and the project-ars is examined.