[REBOL] DIALECT IN REBOL: why advanced documentation so poor in Rebol ?

[youpi . technologies]

Since I am evaluating the language, I am mostly interested about its
advanced features. Although there are hundreds of pages of very good
documentation about the basic syntax of Rebol it really lacks documentation
about the most advanced features which Rebol advertise on like its
dialecting features. I can't see where it is documented ?

Thanks.