[XeTeX]   in XeTeX

[Karljurgen Feuerherm]

>> Now, for the youngsters XML, TeX, HTML are per definition plain text
files.
>
> No, they are text files, not /plain/ text files.  Look
> at some mime types :
>
> 	text/plain (for plain text)
> 	text/html (for HTML)

It depends on who is reading them. Their markup is markup only fron the
point of view of their interpreters, i.e. *TeX, etc. From the point of
view of something else, they are plain.