Patent ID: 6990519
Filing Date: 2006-01-24
Classification: G06F,G06N

Abstract:
1. In an electronic calculator comprising a processor, a display screen and a keyboard, a method of operating the processor to select and organize rules to allow a user to change a selected expression displayed on the display screen from a first state to a preferred state, comprising the steps of: in response to a user input, determining a multiplicity of rules which are applicable to the selected expression; arranging said multiplicity of rules according to a hierarchy of rules; associating said multiplicity of rules with a plurality of nodes, and associating selected ones of said plurality of nodes with another plurality of nodes, such that said plurality of nodes and said another plurality of nodes are indicative of levels of said hierarchy of rules; defining unique identifiers for each of said plurality of nodes and said another plurality of nodes, said unique identifiers corresponding to individual rules and sets of related rules of said multiplicity of rules for changing said selected expression from said first state to said preferred state; and displaying on the display screen indicators for said unique identifiers that may be selected by the user to cause the rules to be applied to said selected expression to change it to said preferred state.