I have been looking at the formats of documents and it seems like
there is NO standard format in which to write documents.
-There seem to exist several differente versions of RTF, so this is no
standard.
-XMGL seems to be a standard for the future, but word-processors
for it do exist, at least in the low-end market.
-The only standard right now for this is HTML and the most extended
version (I think it is 3) does not support formulas. HTML 4 does
seem to support them. But there already exists a latex2html converter
which works quite well.
Taken into account all this, I am dropping the idea of making a
lyx2rtf (and viceversa) converter. The orginal idea was to be able to
interchange documents with Windows word-processors, but this seems to
be a difficult task given the above conditions.
The non-existance of a standard format is really bad news for
everybody. What is happening is that the format being imposed is M$
Word.
Xavier Calbet