18. A method as defined in claim 16 in which the combined table is reformatted into a data set array by: reading each row in said table and each data set in that row; prefixing at least one hierarchy designator corresponding to the level of the data set in a row to each said data set; inserting end-of-data-set delimiters at the end of each said data set; and adding the thus delimited data sets in order to a user defined key data set to create a data set array as aforesaid.
18. A method as defined in claim 16 in which the combined table is reformatted into a data set array by: reading each row in said table and each data set in that row; prefixing at least one hierarchy designator corresponding to the level of the data set in a row to each said data set; inserting end-of-data-set delimiters at the end of each said data set; and adding the thus delimited data sets in order to a user defined key data set to create a data set array as aforesaid. 19. A method as defined in claim 18 which includes the step of excluding from addition to the data set array being created any data set which is a duplicate of an already added data set in the same branch of the hierarchy of data sets in the array.