diff --git a/copying.txt b/copying.txt
new file mode 100644
index 0000000..9e5aef7
--- /dev/null
+++ b/copying.txt
@@ -0,0 +1,24 @@
+=====================================================
+NimYAML -- YAML implementation in Nim.
+
+Copyright (C) 2015 Felix Krause. All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
+[ MIT license: http://www.opensource.org/licenses/mit-license.php ]
\ No newline at end of file
diff --git a/yaml.nim b/yaml.nim
index 95f5826..fb4dac5 100644
--- a/yaml.nim
+++ b/yaml.nim
@@ -1,3 +1,9 @@
+#            NimYAML - YAML implementation in Nim
+#        (c) Copyright 2015 Felix Krause
+#
+#    See the file "copying.txt", included in this
+#    distribution, for details about the copyright.
+
 ## This module provides facilities to generate and interpret
 ## `YAML <http://yaml.org>`_ character streams. All primitive operations on
 ## data objects use a `YamlStream <#YamlStream>`_ either as source or as
@@ -12,6 +18,7 @@
 ## this enhances interoperability with other languages.
 
 import streams, unicode, lexbase, tables, strutils, json, hashes, queues, macros
+export streams, tables, json
 
 type
     YamlTypeHint* = enum