Space and time information system and method

摘要

A programming tool and a method of operating the programming tool models an object that moves through time using an object oriented data model. The data model includes a data parameter and a time parameter. An instance of the object oriented data model has a data value associated with the data parameter and a time value associated with the time parameter. The data value is associated with the instance of the item at the time value. A chain of instances of the object oriented data model represents the object as the object moves and changes through time. The programming tool includes a plurality of methods adapted to operate on the chain of instances of the object oriented data model.