JBL wrote:RTF might be a format used by Word but it is THE format used by Cocoa. If you want things done the way Cocoa does them and you want your documents to be compatible with other Cocoa applications rtf is a good choice. I don't immediately see how rtf forces you to do anything much more word like than be a word processor. Maybe you can give me some examples?
As to the extentions breaking when you go to another word processor, sure that is a problem, but (as I noted above) it is hard to see how that is any worse than a proprietary format. The worst case is that people open your files in TextEdit and see garbage, right? Which I don't see as being any worse than not being able to open them at all. If they can see anything other than garbage that is an improvement. The way it worked in NW Classic was that any text editor could see the text but could not see the formating. I imagine that with an extended rtf version of NWE would other word processors could see the text with the style options from regular rtf but not the added options. How is that worse than a proprietary format?
To start, RTF is a propriety format. It is open, but still the property of its owners, Microsoft, and can be "closed" any time Microsoft would like it closed.
Second, RTF is not the Cocoa "lingua franca" - as a matter of fact, the support for RTF in Mac OS X is pitifully poor and extend to a dozen or so options that TextEdit supports. Nothing more.
Third, the problem with extensions is that they often relate to important options that get lost (ignored) when opening the file in another word processor. For example, if you insert an image to a NWE document and save it as RTF TextEdit will ignore the image (it can't read images). If you save it as RTFD (RTF with a special extension and format) Word will not be able to read the extension command \NeXTGraphic and will therefore be unable to open the document and display the image.
Fourth, there is no feasible way to divorce the special options from recognised options in RTf. You can only ignore them, which, as I've pointed earlier, might seriously limit the usefulness of the document.