Add type requirements for new features.
diff --git a/asio/src/doc/reference.xsl b/asio/src/doc/reference.xsl
index 18fdcd3..4521d07 100644
--- a/asio/src/doc/reference.xsl
+++ b/asio/src/doc/reference.xsl
@@ -60,6 +60,7 @@
 [include requirements/IoControlCommand.qbk]
 [include requirements/IoObjectService.qbk]
 [include requirements/MutableBufferSequence.qbk]
+[include requirements/ObjectHandleService.qbk]
 [include requirements/Protocol.qbk]
 [include requirements/RandomAccessHandleService.qbk]
 [include requirements/RawSocketService.qbk]
@@ -85,7 +86,9 @@
 [include requirements/SyncWriteStream.qbk]
 [include requirements/TimeTraits.qbk]
 [include requirements/TimerService.qbk]
+[include requirements/WaitableTimerService.qbk]
 [include requirements/WaitHandler.qbk]
+[include requirements/WaitTraits.qbk]
 [include requirements/WriteHandler.qbk]
 
 </xsl:text>
diff --git a/asio/src/doc/requirements/ObjectHandleService.qbk b/asio/src/doc/requirements/ObjectHandleService.qbk
new file mode 100644
index 0000000..4fbe00d
--- /dev/null
+++ b/asio/src/doc/requirements/ObjectHandleService.qbk
@@ -0,0 +1,46 @@
+[/
+ / Copyright (c) 2003-2012 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+ /
+ / Distributed under the Boost Software License, Version 1.0. (See accompanying
+ / file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+ /]
+
+[section:ObjectHandleService Object handle service requirements]
+
+An object handle service must meet the requirements for a [link
+asio.reference.HandleService handle service], as well as the additional
+requirements listed below.
+
+In the table below, `X` denotes an object handle service class, `a` denotes a
+value of type `X`, `b` denotes a value of type `X::implementation_type`, `ec`
+denotes a value of type `error_code`, and `wh` denotes a value meeting [link
+asio.reference.WaitHandler `WaitHandler`] requirements.
+
+[table ObjectHandleService requirements
+  [[expression] [return type] [assertion/note\npre/post-condition]]
+  [
+    [`a.wait(b, ec);`]
+    [`error_code`]
+    [
+      pre: `a.is_open(b)`.\n
+      \n
+      Synchronously waits for the object represented by handle `b` to become
+      signalled.
+    ]
+  ]
+  [
+    [`a.async_wait(b, wh);`]
+    [`void`]
+    [
+      pre: `a.is_open(b)`.\n
+      \n
+      Initiates an asynchronous operation to wait for the object represented by
+      handle `b` to become signalled. The operation is performed via the
+      `io_service` object `a.get_io_service()` and behaves according to [link
+      asio.reference.asynchronous_operations asynchronous operation]
+      requirements.
+    ]
+  ]
+]
+
+[endsect]
diff --git a/asio/src/doc/requirements/WaitTraits.qbk b/asio/src/doc/requirements/WaitTraits.qbk
new file mode 100644
index 0000000..1514e3d
--- /dev/null
+++ b/asio/src/doc/requirements/WaitTraits.qbk
@@ -0,0 +1,26 @@
+[/
+ / Copyright (c) 2003-2012 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+ /
+ / Distributed under the Boost Software License, Version 1.0. (See accompanying
+ / file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+ /]
+
+[section:WaitTraits Wait traits requirements]
+
+In the table below, `X` denotes a wait traits class for clock type `Clock`,
+where `Clock` meets the C++11 type requirements for a clock, and `d` denotes
+a value of type `Clock::duration`.
+
+[table WaitTraits requirements
+  [[expression] [return type] [assertion/note\npre/post-condition]]
+  [
+    [`X::to_wait_duration(d);`]
+    [`Clock::duration`]
+    [
+      Returns the maximum duration to be used for an individual,
+      implementation-defined wait operation.
+    ]
+  ]
+]
+
+[endsect]
diff --git a/asio/src/doc/requirements/WaitableTimerService.qbk b/asio/src/doc/requirements/WaitableTimerService.qbk
new file mode 100644
index 0000000..6026a60
--- /dev/null
+++ b/asio/src/doc/requirements/WaitableTimerService.qbk
@@ -0,0 +1,104 @@
+[/
+ / Copyright (c) 2003-2012 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+ /
+ / Distributed under the Boost Software License, Version 1.0. (See accompanying
+ / file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+ /]
+
+[section:WaitableTimerService Waitable timer service requirements]
+
+A waitable timer service must meet the requirements for an [link
+asio.reference.IoObjectService I/O object service], as well as the
+additional requirements listed below.
+
+In the table below, `X` denotes a waitable timer service class for clock type
+`Clock`, where `Clock` meets the C++11 clock type requirements, `a` denotes a
+value of type `X`, `b` denotes a value of type `X::implementation_type`, `t`
+denotes a value of type `Clock::time_point`, `d` denotes a value of type
+`Clock::duration`, `e` denotes a value of type `error_code`, and `h` denotes a
+value meeting [link asio.reference.WaitHandler `WaitHandler`] requirements.
+
+[table WaitableTimerService requirements
+  [[expression] [return type] [assertion/note\npre/post-condition]]
+  [
+    [`a.destroy(b);`]
+    []
+    [
+      From [link asio.reference.IoObjectService IoObjectService]
+      requirements. Implicitly cancels asynchronous wait operations, as if by
+      calling `a.cancel(b, e)`.
+    ]
+  ]
+  [
+    [``
+      a.cancel(b, e);
+    ``]
+    [`size_t`]
+    [
+      Causes any outstanding asynchronous wait operations to complete as soon
+      as possible. Handlers for cancelled operations shall be passed the error
+      code `error::operation_aborted`. Sets `e` to indicate success or failure.
+      Returns the number of operations that were cancelled.
+    ]
+  ]
+  [
+    [`a.expires_at(b);`]
+    [`Clock::time_point`]
+    []
+  ]
+  [
+    [``
+      a.expires_at(b, t, e);
+    ``]
+    [`size_t`]
+    [
+      Implicitly cancels asynchronous wait operations, as if by calling
+      `a.cancel(b, e)`. Returns the number of operations that were cancelled.\n
+      post: `a.expires_at(b) == t`.
+    ]
+  ]
+  [
+    [`a.expires_from_now(b);`]
+    [`Clock::duration`]
+    [
+      Returns a value equivalent to `a.expires_at(b) - Clock::now()`.
+    ]
+  ]
+  [
+    [``
+      a.expires_from_now(b, d, e);
+    ``]
+    [`size_t`]
+    [
+      Equivalent to `a.expires_at(b, Clock::now() + d, e)`.
+    ]
+  ]
+  [
+    [``
+      a.wait(b, e);
+    ``]
+    [`error_code`]
+    [
+      Sets `e` to indicate success or failure. Returns `e`.\n
+      post: `!!e || !(Clock::now() < a.expires_at(b))`.
+    ]
+  ]
+  [
+    [``
+      a.async_wait(b, h);
+    ``]
+    []
+    [
+      Initiates an asynchronous wait operation that is performed via the
+      `io_service` object `a.get_io_service()` and behaves according to [link
+      asio.reference.asynchronous_operations asynchronous operation]
+      requirements.\n
+      \n
+      The handler shall be posted for execution only if the condition
+      `!!ec || !(Clock::now() < a.expires_at(b))`
+      holds, where `ec` is the error code to be passed to the handler.
+    ]
+  ]
+]
+
+[endsect]