map.connect ':year/:month/:day/:permalink', :controller => 'posts', :action => 'display_by_date',
                :month => nil, :day => nil, :permalink => nil,
                :requirements => {:year => /\d{4}/, :day => /\d{1,2}/, :month => /\d{1,2}/}

  #chapters_path => /chapters
  #chapter_path(1) => /chapters/1
  #formatted_chapter_path(1) => /chapters/1.xml
  map.resources :posts do |posts|
    #/posts/1/revisions/7
    #revision_path(id_of_chapter, id_of_revision)
    posts.resources :revisions, :comments
  end