Method of creating a data item object suitable for an application from a standard object oriented part

Claim 1

A computer program stored in a storage medium for creating a data item object for use by a business processing program being executed by a computer based on object oriented parts contained in an item class library, and for processing the created data item object, each of said object oriented parts being composed of a data section and a procedure section, said data section defining a variety of input/output data attributes along with their data representing forms for a data item and said procedure section defining an input process performed on the data item for any defined input data attribute input into the business processing program and an output process performed on the data item for any defined output data attribute output from the business processing apparatus, said computer program when executed by said computer causes said computer to perform the steps of: (a) selecting from said item class library an object oriented part in response to a request for said object oriented part from said business processing program; (b) creating a data item object from the selected object oriented part by setting data attributes in a form of a data attribute definition table in said data section of said object oriented part, said data attribute definition table being composed of at least one pair of data attribute and data processing attribute; and (c) executing an input processing of the data item object in response to data input into the business processing program and executing output processing of the data item object for data output from the business processing program based on content of said data attribute definition table in the data item object.