Hi,

In message "Re: Ruby Doc Vision (was Re: Docs for Socket, OpenSSL, etc)"
    on 03/12/12, Gavin Sinclair <gsinclair / soyabean.com.au> writes:

|* rd is being used less and less.

For documenting Ruby code, yes.  But it's still used for other
purposes, for example, writing books and articles.  www.ruby-lang.org
and my blog (Japanese) is written in RD, to name a few.

							matz.