sidpatil answered (sibling comment). The RTF spec was freely available (on MS's site and/or MSDN CDs then) and should still be around, at least on some sites, s

sidpatil answered (sibling comment). The RTF spec was freely available (on MS's site and/or MSDN CDs then) and should still be around, at least on some sites, since RTF is still used a lot as an exchange format between word processors and even other software. So you can read the spec; it is straightforward. RTF is to Word like CSV is to Excel. In fact, we generated RTF because the output was to be input to Adobe InDesign.