16. The data processing system of claim 10 , further comprising a display, wherein the program instructs the display to display the single data set on a footnote view.
10. A data processing system comprising: a non-volatile storage device storing a first markup document and a second markup document, both the first markup document and the second markup document containing numerical values and tags reflecting characteristics of the numerical values, wherein the characteristics indicate that the numerical values of the first markup document differ in format from the numerical values of the second markup document; a memory storing a program that receives the first markup document and the second markup document, that automatically transforms the numerical values of at least one of the first markup document and the second markup document so that the numerical values of the first markup document and the second markup document have a common format, and that combines the first markup document and the second markup document into a single data set; and a processor that runs the program.