Index: Doc/library/json.rst
===================================================================
--- Doc/library/json.rst	(revision 81719)
+++ Doc/library/json.rst	(working copy)
@@ -154,7 +154,7 @@
 
    To use a custom :class:`JSONEncoder` subclass (e.g. one that overrides the
    :meth:`default` method to serialize additional types), specify it with the
-   *cls* kwarg.
+   *cls* kwarg; otherwise :class:`JSONEncoder` is used.
 
 
 .. function:: dumps(obj[, skipkeys[, ensure_ascii[, check_circular[, allow_nan[, cls[, indent[, separators[, encoding[, default[, **kw]]]]]]]]]])
@@ -209,8 +209,8 @@
    are encountered.
 
    To use a custom :class:`JSONDecoder` subclass, specify it with the ``cls``
-   kwarg.  Additional keyword arguments will be passed to the constructor of the
-   class.
+   kwarg; otherwise :class:`JSONDecoder` is used.  Additional keyword arguments
+   will be passed to the constructor of the class.
 
 
 .. function:: loads(s[, encoding[, cls[, object_hook[, parse_float[, parse_int[, parse_constant[, object_pairs_hook[, **kw]]]]]]]])
@@ -296,7 +296,12 @@
    ``'false'``.  This can be used to raise an exception if invalid JSON numbers
    are encountered.
 
+   If *strict* is ``False`` (``True`` is the default), then control characters
+   will be allowed inside strings.  Control characters in this context are
+   those with character codes in the 0-31 range, including ``'\t'`` (tab),
+   ``'\n'``, ``'\r'`` and ``'\0'``.
 
+
    .. method:: decode(s)
 
       Return the Python representation of *s* (a :class:`str` or
Index: Lib/json/__init__.py
===================================================================
--- Lib/json/__init__.py	(revision 81719)
+++ Lib/json/__init__.py	(working copy)
@@ -160,7 +160,7 @@
 
     To use a custom ``JSONEncoder`` subclass (e.g. one that overrides the
     ``.default()`` method to serialize additional types), specify it with
-    the ``cls`` kwarg.
+    the ``cls`` kwarg; otherwise ``JSONEncoder`` is used.
 
     """
     # cached encoder
@@ -220,7 +220,7 @@
 
     To use a custom ``JSONEncoder`` subclass (e.g. one that overrides the
     ``.default()`` method to serialize additional types), specify it with
-    the ``cls`` kwarg.
+    the ``cls`` kwarg; otherwise ``JSONEncoder`` is used.
 
     """
     # cached encoder
@@ -259,8 +259,16 @@
     ``object_hook`` will be used instead of the ``dict``. This feature
     can be used to implement custom decoders (e.g. JSON-RPC class hinting).
 
+    ``object_pairs_hook`` is an optional function that will be called with the
+    result of any object literal decoded with an ordered list of pairs.  The
+    return value of ``object_pairs_hook`` will be used instead of the ``dict``.
+    This feature can be used to implement custom decoders that rely on the
+    order that the key and value pairs are decoded (for example,
+    collections.OrderedDict will remember the order of insertion). If
+    ``object_hook`` is also defined, the ``object_pairs_hook`` takes priority.
+
     To use a custom ``JSONDecoder`` subclass, specify it with the ``cls``
-    kwarg.
+    kwarg; otherwise ``JSONDecoder`` is used.
 
     """
     return loads(fp.read(),
@@ -285,6 +293,14 @@
     ``object_hook`` will be used instead of the ``dict``. This feature
     can be used to implement custom decoders (e.g. JSON-RPC class hinting).
 
+    ``object_pairs_hook`` is an optional function that will be called with the
+    result of any object literal decoded with an ordered list of pairs.  The
+    return value of ``object_pairs_hook`` will be used instead of the ``dict``.
+    This feature can be used to implement custom decoders that rely on the
+    order that the key and value pairs are decoded (for example,
+    collections.OrderedDict will remember the order of insertion). If
+    ``object_hook`` is also defined, the ``object_pairs_hook`` takes priority.
+
     ``parse_float``, if specified, will be called with the string
     of every JSON float to be decoded. By default this is equivalent to
     float(num_str). This can be used to use another datatype or parser
@@ -301,7 +317,7 @@
     are encountered.
 
     To use a custom ``JSONDecoder`` subclass, specify it with the ``cls``
-    kwarg.
+    kwarg; otherwise ``JSONDecoder`` is used.
 
     """
     if (cls is None and encoding is None and object_hook is None and
Index: Lib/json/decoder.py
===================================================================
--- Lib/json/decoder.py	(revision 81719)
+++ Lib/json/decoder.py	(working copy)
@@ -310,6 +310,15 @@
         place of the given ``dict``.  This can be used to provide custom
         deserializations (e.g. to support JSON-RPC class hinting).
 
+        ``object_pairs_hook``, if specified will be called with the result of
+        every JSON object decoded with an ordered list of pairs.  The return
+        value of ``object_pairs_hook`` will be used instead of the ``dict``.
+        This feature can be used to implement custom decoders that rely on the
+        order that the key and value pairs are decoded (for example,
+        collections.OrderedDict will remember the order of insertion). If
+        ``object_hook`` is also defined, the ``object_pairs_hook`` takes
+        priority.
+
         ``parse_float``, if specified, will be called with the string
         of every JSON float to be decoded. By default this is equivalent to
         float(num_str). This can be used to use another datatype or parser
@@ -325,6 +334,11 @@
         This can be used to raise an exception if invalid JSON numbers
         are encountered.
 
+        If ``strict`` is false (true is the default), then control
+        characters will be allowed inside strings.  Control characters in
+        this context are those with character codes in the 0-31 range,
+        including ``'\\t'`` (tab), ``'\\n'``, ``'\\r'`` and ``'\\0'``.
+
         """
         self.encoding = encoding
         self.object_hook = object_hook