3 files changed, 13 insertions, 2 deletions
diff --git a/lib/psych/handler.rb b/lib/psych/handler.rb
index 84ce4c2..f67a554 100644
--- a/lib/psych/handler.rb
+++ b/lib/psych/handler.rb
@@ -10,7 +10,7 @@ module Psych
     ###
     # Called when the document starts with the declared +version+,
     # +tag_directives+, if the document is +implicit+
-    def start_document version = [], tag_directives = [], implicit = true
+    def start_document version, tag_directives, implicit
     end
 
     ###
diff --git a/lib/psych/nodes/document.rb b/lib/psych/nodes/document.rb
index 05eca82..0bd58b2 100644
--- a/lib/psych/nodes/document.rb
+++ b/lib/psych/nodes/document.rb
@@ -10,12 +10,19 @@ module Psych
       # Was this document implicitly created?
       attr_accessor :implicit
 
-      def initialize version, tag_directives, implicit
+      def initialize version = [], tag_directives = [], implicit = true
         super()
         @version        = version
         @tag_directives = tag_directives
         @implicit       = implicit
       end
+
+      ###
+      # Returns the root node.  A Document may only have one root node:
+      # http://yaml.org/spec/1.1/#id898031
+      def root
+        children.first
+      end
     end
   end
 end
diff --git a/lib/psych/visitors/to_ruby.rb b/lib/psych/visitors/to_ruby.rb
index b82fc3c..a4e6152 100644
--- a/lib/psych/visitors/to_ruby.rb
+++ b/lib/psych/visitors/to_ruby.rb
@@ -14,6 +14,10 @@ module Psych
       visitor_for(Nodes::Mapping) do |o|
         Hash[*o.children.map { |c| c.accept self }]
       end
+
+      visitor_for(Nodes::Document) do |o|
+        o.root.accept self
+      end
     end
   end
 end