Info. needed regarding File Formats

Hello, I'm new to this group. I want to write a conversion pkg to convert data from one format to another. For that I need the file formats of the following: Some Databases like: Paradox, Informix, Oracle, Sybase, Dbase III+, Dbase IV, Foxbase, Access etc. Could someone pl. send me the file formats for some(or all) of the above or some information as to where I could find them? Are there any books that I could refer to? I will be using DOS environment. Is this the right newsgroup to post this?(If not I'm sorry, pl. guide me). Are there any other newsgroups to which I could post the above? Any help would be appreciated. Thanks in advance. Pl. reply to my e-mail address. I will post a summary if I get interesting answers. Thanks Sunita. -- e-mail: jethani@plains.nodak.edu phone: (701) 237-4871