12. A computer system as in claim 11 , wherein the user interface includes a control file information section, having an object tree, attributes tab, and control file preview area, and a data file information section, having a spreadsheet data area reflecting the spreadsheet dataset, wherein: a) selecting the business object in the object tree opens a list of one or more attributes for the business object in the attributes tab; b) attributes from the open list of attributes may be dragged and dropped into columns in the spreadsheet data area; and c) the spreadsheet dataloader uses the attributes dropped into the spreadsheet data area to map the columns to the business objects and to create the control file from the mapping.
18. A computer system as in claim 12 wherein the spreadsheet data area of the user interface includes editing functions.