using ruby facets annotations with yaml

    require 'rubygems'
    require 'facets/annotations';

    ann :say_hello,{:__meta__=>'   
        ### main:
        ###   - desc: |
        ###         return the string 'hello world'
        ###         usage: puts foo.say_hello()
        ### keywords : [alpha , bravo , charlie , delta , echo]
        ### params :
        ###   - {name : fooname, ropt : optional, desc : foodesc}
        ###   - {name : barname, ropt : optional, desc : bardesc}
    '}   
    def say_hello()
        'hello world'
    end