database file formats info requested

I am posting this for a co-worker that does not have net access. You may respond to me or him. Hi, I am interested in finding information on the file formats in Informix, Progress, and Oracle. Are there utilities out there that will read the database files for these databases. We are trying to tie the data together from several different sources and would like to create a central utility. We have had trouble using anyone of these sources. The Progress utilities require that you precompile and hard code the name of the files that you wish to modify. It is ignorant of Informix data files as well. Informix and Oracle have their problems as well. I would like share ware or lists of vendor software either or both are fine. If the file formats are documented in good texts that information would be most welcome. Thank You for any assistance. don fair. dhf@green.att.com -- Until later, Geoffrey Myers 404.750.5247 cbnewsm!geof gamyers@attmail.att.com ...!att!attmail!gamyers geof@green.att.com ...!att!green!geof