1. A computer readable storage medium comprising a computer readable program stored on a tangible storage device for modifying data set names, wherein the computer readable program when executed on a computer causes the computer to: receive a data set name as an index of a catalog entry for a catalog, wherein the data set name comprises at least two qualifiers; modify at least one data set name qualifier using a naming algorithm, wherein an alias qualifier is not modified; and store the catalog entry indexed with the modified data set name.