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.
RTF is to Word like CSV is to Excel. In fact, we generated RTF because the output was to be input to Adobe InDesign.