diff --git a/lib/rails_big_brother.rb b/lib/rails_big_brother.rb
index cc4e37d..1ff3826 100644
--- a/lib/rails_big_brother.rb
+++ b/lib/rails_big_brother.rb
@@ -3,6 +3,14 @@ require "rails_big_brother/controller"
 require "rails_big_brother/model"
 
 module RailsBigBrother
+  def format=(value)
+    @format = value
+  end
+
+  def format
+    @format ||= "%<big_brother>s;%<user>s;%<controller_info>s;%<class>s;%<id>s;%<action>s;%<args>s"
+  end
+
   def user=(value)
     store[:user] = value
   end
diff --git a/lib/rails_big_brother/model.rb b/lib/rails_big_brother/model.rb
index 1f4d778..18d7e24 100644
--- a/lib/rails_big_brother/model.rb
+++ b/lib/rails_big_brother/model.rb
@@ -43,10 +43,16 @@ module RailsBigBrother
       end
 
       def big_brother_log(action, *args)
-        # TODO RailsBigBrother.format, RailsBigBrother.separator
-        Rails.logger.info "big_brother;#{RailsBigBrother.user};" <<
-          "#{RailsBigBrother.controller_info_string};" <<
-          "#{self.class.name};#{self.to_param};#{action};#{args.join(';')}"
+        Rails.logger.info RailsBigBrother.format %
+        {
+          big_brother: "big_brother",
+          user: RailsBigBrother.user,
+          controller_info: RailsBigBrother.controller_info_string,
+          class: self.class.name,
+          id: self.to_param,
+          action: action,
+          args: args.join(',')
+        }
       end
     end
   end