http://xa63tpfoaqt3zru2ehxjjfbpadwj4ha6qsdvtcqtyr3b7hmt4iaq.b32.i2p/features.html
Alternately, the
signing public keys of individual authorized users may be listed in
the medtata. Individual posts may contain many different elements: Any number of pages, with out of band data for each page specifying
the content type, language, etc. Any formatting may be used, as its
up to the client application to render the content safely - plain text
must be supported, and clients that can should support HTML.