diff --git a/boost/predef/architecture/alpha.h b/boost/predef/architecture/alpha.h
index f25bc46..04e4cd7 100644
--- a/boost/predef/architecture/alpha.h
+++ b/boost/predef/architecture/alpha.h
@@ -15,7 +15,7 @@ http://www.boost.org/LICENSE_1_0.txt)
 [heading `BOOST_ARCHITECTURE_ALPHA`]
 
 [@http://en.wikipedia.org/wiki/DEC_Alpha DEC Alpha] architecture:
-If available versions [4-6] are specifically detected.
+If available versions \[4-6\] are specifically detected.
  */
 
 #define BOOST_ARCHITECTURE_ALPHA BOOST_VERSION_NUMBER(0,0,0)
diff --git a/boost/predef/architecture/superh.h b/boost/predef/architecture/superh.h
index 2710909..f8126a0 100644
--- a/boost/predef/architecture/superh.h
+++ b/boost/predef/architecture/superh.h
@@ -15,7 +15,7 @@ http://www.boost.org/LICENSE_1_0.txt)
 [heading `BOOST_ARCHITECTURE_SH`]
 
 [@http://en.wikipedia.org/wiki/SuperH SuperH] architecture:
-If available versions [1-5] are specifically detected.
+If available versions \[1-5\] are specifically detected.
  */
 
 #define BOOST_ARCHITECTURE_SH BOOST_VERSION_NUMBER(0,0,0)
diff --git a/boost/predef/architecture/x86.h b/boost/predef/architecture/x86.h
index 785f20c..e5afc92 100644
--- a/boost/predef/architecture/x86.h
+++ b/boost/predef/architecture/x86.h
@@ -17,7 +17,7 @@ http://www.boost.org/LICENSE_1_0.txt)
 [heading `BOOST_ARCHITECTURE_X86`]
 
 [@http://en.wikipedia.org/wiki/X86 Intel x86] architecture:
-If available versions [3-6] are specifically detected.
+If available versions \[3-6\] are specifically detected.
  */
 
 #if defined(i386) || defined(__i386__) || \
diff --git a/boost/predef/language/stdcpp.h b/boost/predef/language/stdcpp.h
index d2a32cd..36b3e58 100644
--- a/boost/predef/language/stdcpp.h
+++ b/boost/predef/language/stdcpp.h
@@ -18,7 +18,7 @@ http://www.boost.org/LICENSE_1_0.txt)
 If available, the year of the standard is detected as 0.0.YYYY.
 Because of the way the C++ standardization process works the
 defined version year will not be the commonly known year standard.
-Specifically the defined versions will be:
+Specifically the defined versions are:
 
 [table Detected Version Number vs. C++ Standard Year
   [[Detected Version Number] [Standard Year] [C++ Standard]]
diff --git a/boost/predef/os/cygwin.h b/boost/predef/os/cygwin.h
index b16bb96..6b06c65 100644
--- a/boost/predef/os/cygwin.h
+++ b/boost/predef/os/cygwin.h
@@ -11,6 +11,12 @@ http://www.boost.org/LICENSE_1_0.txt)
 #include <boost/predef/version_number.h>
 #include <boost/predef/make.h>
 
+/*`
+[heading `BOOST_OS_CYGWIN`]
+
+[@http://en.wikipedia.org/wiki/XXX Cygwin] operating system.
+ */
+
 #define BOOST_OS_CYGWIN BOOST_VERSION_NUMBER(0,0,0)
 
 #if defined(__CYGWIN__)
diff --git a/boost/predef/os/hpux.h b/boost/predef/os/hpux.h
index 0153bd7..04e1ea5 100644
--- a/boost/predef/os/hpux.h
+++ b/boost/predef/os/hpux.h
@@ -11,6 +11,12 @@ http://www.boost.org/LICENSE_1_0.txt)
 #include <boost/predef/version_number.h>
 #include <boost/predef/make.h>
 
+/*`
+[heading `BOOST_OS_HPUX`]
+
+[@http://en.wikipedia.org/wiki/XXX HP-UX] operating system.
+ */
+
 #define BOOST_OS_HPUX BOOST_VERSION_NUMBER(0,0,0)
 
 #if defined(hpux) || defined(_hpux) || defined(__hpux)
diff --git a/boost/predef/os/irix.h b/boost/predef/os/irix.h
index 957f136..db77cbf 100644
--- a/boost/predef/os/irix.h
+++ b/boost/predef/os/irix.h
@@ -11,6 +11,12 @@ http://www.boost.org/LICENSE_1_0.txt)
 #include <boost/predef/version_number.h>
 #include <boost/predef/make.h>
 
+/*`
+[heading `BOOST_OS_IRIX`]
+
+[@http://en.wikipedia.org/wiki/XXX Irix] operating system.
+ */
+
 #define BOOST_OS_IRIX BOOST_VERSION_NUMBER(0,0,0)
 
 #if defined(sgi) || defined(__sgi)
diff --git a/boost/predef/os/linux.h b/boost/predef/os/linux.h
index 9161ed4..c01a981 100644
--- a/boost/predef/os/linux.h
+++ b/boost/predef/os/linux.h
@@ -11,6 +11,12 @@ http://www.boost.org/LICENSE_1_0.txt)
 #include <boost/predef/version_number.h>
 #include <boost/predef/make.h>
 
+/*`
+[heading `BOOST_OS_LINUX`]
+
+[@http://en.wikipedia.org/wiki/XXX Linux] operating system.
+ */
+
 #define BOOST_OS_LINUX BOOST_VERSION_NUMBER(0,0,0)
 
 #if defined(linux) || defined(__linux)
diff --git a/boost/predef/os/macos.h b/boost/predef/os/macos.h
index 5128c7e..11ad38d 100644
--- a/boost/predef/os/macos.h
+++ b/boost/predef/os/macos.h
@@ -11,6 +11,13 @@ http://www.boost.org/LICENSE_1_0.txt)
 #include <boost/predef/version_number.h>
 #include <boost/predef/make.h>
 
+/*`
+[heading `BOOST_OS_MACOS`]
+
+[@http://en.wikipedia.org/wiki/XXX MacOS] operating system.
+Versions \[9-10\] are specifically detected.
+ */
+
 #define BOOST_OS_MACOS BOOST_VERSION_NUMBER(0,0,0)
 
 #if defined(macintosh) || defined(Macintosh) || \
diff --git a/boost/predef/os/qnxnto.h b/boost/predef/os/qnxnto.h
index d41c680..65765a7 100644
--- a/boost/predef/os/qnxnto.h
+++ b/boost/predef/os/qnxnto.h
@@ -11,6 +11,14 @@ http://www.boost.org/LICENSE_1_0.txt)
 #include <boost/predef/version_number.h>
 #include <boost/predef/make.h>
 
+/*`
+[heading `BOOST_OS_QNX`]
+
+[@http://en.wikipedia.org/wiki/XXX QNX-NTO] operating system.
+Version number available as major, and minor if possible. And
+version 4 is specifically detected.
+ */
+
 #define BOOST_OS_QNX BOOST_VERSION_NUMBER(0,0,0)
 
 #if defined(__QNX__) || defined(__QNXNTO__)
diff --git a/boost/predef/os/solaris.h b/boost/predef/os/solaris.h
index 128e8f1..caed2df 100644
--- a/boost/predef/os/solaris.h
+++ b/boost/predef/os/solaris.h
@@ -11,6 +11,12 @@ http://www.boost.org/LICENSE_1_0.txt)
 #include <boost/predef/version_number.h>
 #include <boost/predef/make.h>
 
+/*`
+[heading `BOOST_OS_SOLARIS`]
+
+[@http://en.wikipedia.org/wiki/XXX Solaris] operating system.
+ */
+
 #define BOOST_OS_SOLARIS BOOST_VERSION_NUMBER(0,0,0)
 
 #if defined(sun) || defined(__sun)
diff --git a/boost/predef/os/unix.h b/boost/predef/os/unix.h
index fd76f34..c06493d 100644
--- a/boost/predef/os/unix.h
+++ b/boost/predef/os/unix.h
@@ -11,6 +11,12 @@ http://www.boost.org/LICENSE_1_0.txt)
 #include <boost/predef/version_number.h>
 #include <boost/predef/make.h>
 
+/*`
+[heading `BOOST_OS_UNIX`]
+
+[@http://en.wikipedia.org/wiki/XXX Unix] operating system.
+ */
+
 #define BOOST_OS_UNIX BOOST_VERSION_NUMBER(0,0,0)
 
 #if defined(unix) || defined(__unix) || \
diff --git a/boost/predef/os/windows.h b/boost/predef/os/windows.h
index 400067f..5312c24 100644
--- a/boost/predef/os/windows.h
+++ b/boost/predef/os/windows.h
@@ -11,6 +11,12 @@ http://www.boost.org/LICENSE_1_0.txt)
 #include <boost/predef/version_number.h>
 #include <boost/predef/make.h>
 
+/*`
+[heading `BOOST_OS_WINDOWS`]
+
+[@http://en.wikipedia.org/wiki/XXX Microsoft Windows] operating system.
+ */
+
 #define BOOST_OS_WINDOWS BOOST_VERSION_NUMBER(0,0,0)
 
 #if defined(_WIN32) || defined(_WIN64) || \
diff --git a/libs/predef/doc/html/index.html b/libs/predef/doc/html/index.html
index b87e7f7..641a970 100644
--- a/libs/predef/doc/html/index.html
+++ b/libs/predef/doc/html/index.html
@@ -61,7 +61,7 @@
 </table></div>
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
-<td align="left"><p><small>Last revised: November 30, 2011 at 05:42:16 GMT</small></p></td>
+<td align="left"><p><small>Last revised: November 30, 2011 at 23:35:32 GMT</small></p></td>
 <td align="right"><div class="copyright-footer"></div></td>
 </tr></table>
 <hr>
diff --git a/libs/predef/doc/html/predef/reference.html b/libs/predef/doc/html/predef/reference.html
index b238c41..5bd1666 100644
--- a/libs/predef/doc/html/predef/reference.html
+++ b/libs/predef/doc/html/predef/reference.html
@@ -428,7 +428,7 @@
         If available, the year of the standard is detected as 0.0.YYYY. Because of
         the way the C++ standardization process works the defined version year will
         not be the commonly known year standard. Specifically the defined versions
-        will be:
+        are:
       </p>
 <div class="table">
 <a name="predef.reference.boost_language_language_standard.detected_version_number_vs_c_sta"></a><p class="title"><b>Table&#160;1.&#160;Detected Version Number vs. C++ Standard Year</b></p>
@@ -729,6 +729,73 @@
           is detected the corresponding macro is also set.
         </p></td></tr>
 </table></div>
+<h5>
+<a name="predef.reference.boost_os_operating_system_macros.h4"></a>
+        <span><a name="predef.reference.boost_os_operating_system_macros.boost_os_cygwin"></a></span><a class="link" href="reference.html#predef.reference.boost_os_operating_system_macros.boost_os_cygwin"><code class="computeroutput"><span class="identifier">BOOST_OS_CYGWIN</span></code></a>
+      </h5>
+<p>
+        <a href="http://en.wikipedia.org/wiki/XXX" target="_top">Cygwin</a> operating system.
+      </p>
+<h5>
+<a name="predef.reference.boost_os_operating_system_macros.h5"></a>
+        <span><a name="predef.reference.boost_os_operating_system_macros.boost_os_hpux"></a></span><a class="link" href="reference.html#predef.reference.boost_os_operating_system_macros.boost_os_hpux"><code class="computeroutput"><span class="identifier">BOOST_OS_HPUX</span></code></a>
+      </h5>
+<p>
+        <a href="http://en.wikipedia.org/wiki/XXX" target="_top">HP-UX</a> operating system.
+      </p>
+<h5>
+<a name="predef.reference.boost_os_operating_system_macros.h6"></a>
+        <span><a name="predef.reference.boost_os_operating_system_macros.boost_os_irix"></a></span><a class="link" href="reference.html#predef.reference.boost_os_operating_system_macros.boost_os_irix"><code class="computeroutput"><span class="identifier">BOOST_OS_IRIX</span></code></a>
+      </h5>
+<p>
+        <a href="http://en.wikipedia.org/wiki/XXX" target="_top">Irix</a> operating system.
+      </p>
+<h5>
+<a name="predef.reference.boost_os_operating_system_macros.h7"></a>
+        <span><a name="predef.reference.boost_os_operating_system_macros.boost_os_linux"></a></span><a class="link" href="reference.html#predef.reference.boost_os_operating_system_macros.boost_os_linux"><code class="computeroutput"><span class="identifier">BOOST_OS_LINUX</span></code></a>
+      </h5>
+<p>
+        <a href="http://en.wikipedia.org/wiki/XXX" target="_top">Linux</a> operating system.
+      </p>
+<h5>
+<a name="predef.reference.boost_os_operating_system_macros.h8"></a>
+        <span><a name="predef.reference.boost_os_operating_system_macros.boost_os_macos"></a></span><a class="link" href="reference.html#predef.reference.boost_os_operating_system_macros.boost_os_macos"><code class="computeroutput"><span class="identifier">BOOST_OS_MACOS</span></code></a>
+      </h5>
+<p>
+        <a href="http://en.wikipedia.org/wiki/XXX" target="_top">MacOS</a> operating system.
+        Versions [9-10] are specifically detected.
+      </p>
+<h5>
+<a name="predef.reference.boost_os_operating_system_macros.h9"></a>
+        <span><a name="predef.reference.boost_os_operating_system_macros.boost_os_qnx"></a></span><a class="link" href="reference.html#predef.reference.boost_os_operating_system_macros.boost_os_qnx"><code class="computeroutput"><span class="identifier">BOOST_OS_QNX</span></code></a>
+      </h5>
+<p>
+        <a href="http://en.wikipedia.org/wiki/XXX" target="_top">QNX-NTO</a> operating system.
+        Version number available as major, and minor if possible. And version 4 is
+        specifically detected.
+      </p>
+<h5>
+<a name="predef.reference.boost_os_operating_system_macros.h10"></a>
+        <span><a name="predef.reference.boost_os_operating_system_macros.boost_os_solaris"></a></span><a class="link" href="reference.html#predef.reference.boost_os_operating_system_macros.boost_os_solaris"><code class="computeroutput"><span class="identifier">BOOST_OS_SOLARIS</span></code></a>
+      </h5>
+<p>
+        <a href="http://en.wikipedia.org/wiki/XXX" target="_top">Solaris</a> operating system.
+      </p>
+<h5>
+<a name="predef.reference.boost_os_operating_system_macros.h11"></a>
+        <span><a name="predef.reference.boost_os_operating_system_macros.boost_os_unix"></a></span><a class="link" href="reference.html#predef.reference.boost_os_operating_system_macros.boost_os_unix"><code class="computeroutput"><span class="identifier">BOOST_OS_UNIX</span></code></a>
+      </h5>
+<p>
+        <a href="http://en.wikipedia.org/wiki/XXX" target="_top">Unix</a> operating system.
+      </p>
+<h5>
+<a name="predef.reference.boost_os_operating_system_macros.h12"></a>
+        <span><a name="predef.reference.boost_os_operating_system_macros.boost_os_windows"></a></span><a class="link" href="reference.html#predef.reference.boost_os_operating_system_macros.boost_os_windows"><code class="computeroutput"><span class="identifier">BOOST_OS_WINDOWS</span></code></a>
+      </h5>
+<p>
+        <a href="http://en.wikipedia.org/wiki/XXX" target="_top">Microsoft Windows</a> operating
+        system.
+      </p>
 </div>
 <div class="section">
 <div class="titlepage"><div><div><h3 class="title">