Move the 3k reST doc tree in place.
diff --git a/Doc/library/constants.rst b/Doc/library/constants.rst
new file mode 100644
index 0000000..fecd836
--- /dev/null
+++ b/Doc/library/constants.rst
@@ -0,0 +1,42 @@
+
+Built-in Constants
+==================
+
+A small number of constants live in the built-in namespace. They are:
+
+
+.. data:: False
+
+ The false value of the :class:`bool` type.
+
+ .. versionadded:: 2.3
+
+
+.. data:: True
+
+ The true value of the :class:`bool` type.
+
+ .. versionadded:: 2.3
+
+
+.. data:: None
+
+ The sole value of :attr:`types.NoneType`. ``None`` is frequently used to
+ represent the absence of a value, as when default arguments are not passed to a
+ function.
+
+
+.. data:: NotImplemented
+
+ Special value which can be returned by the "rich comparison" special methods
+ (:meth:`__eq__`, :meth:`__lt__`, and friends), to indicate that the comparison
+ is not implemented with respect to the other type.
+
+
+.. data:: Ellipsis
+
+ The same as ``...``. Special value used mostly in conjunction with extended
+ slicing syntax for user-defined container data types.
+
+ .. % XXX Someone who understands extended slicing should fill in here.
+