TextEdit's Default Format: RTF... Why?
Subject:   RTF Structure
Date:   2005-10-20 10:38:33
From:   kiyookasan
RTF is highly structured. What it is not is bloated. It was never meant to be written with a text editor. It was designed to flatten complex document structures into a character stream.

RTF can also handle embedded binary objects which are represented on OSX by 'RTFD' package folders. These package folders do not conform to RTF - it is an extension.

Gen Kiyooka