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<p> The OpenCL registry contains specifications of the core API and the
OpenCL C language; a portable intermediate representation of OpenCL
programs; specifications of Khronos- and vendor-approved OpenCL
extensions; reference pages for different OpenCL versions; and links to
header files corresponding to the specifications, which are now hosted
in the <a href="https://www.github.com/KhronosGroup/OpenCL-Headers/">
OpenCL-Headers </a> Github repository. </p>
<p> The OpenCL Standard Portable Intermediate Representation (SPIR) is
found in the <a href="../spir/">SPIR Registry</a>. </p>
<p> The SYCL specification is found in the <a href="../sycl/">SYCL
Registry</a>. </p>
<p> The registry, including published specifications and Docbook XML source
for the reference pages, is hosted in the <a
href="https://github.com/KhronosGroup/OpenCL-Registry/"> OpenCL-Registry
</a> Github repository. </li>
<h6> OpenCL Core API and C Language Specification, Headers, and Documentation </h6>
<p> The current version of OpenCL is OpenCL 2.2. </p>
<p> The asciidoc source for the OpenCL 2.2 Specifications is available in
the <a href="https://github.com/KhronosGroup/OpenCL-Docs">
KhronosGroup/OpenCL-Docs </a> Github repository. </p>
<ul>
<li> OpenCL 2.2 API Specification
(<a href="specs/opencl-2.2.pdf">PDF</a>)
(<a href="specs/opencl-2.2.html">HTML</a>)
(May 12, 2017). </li>
<li> OpenCL 2.2 Extension Specification
(<a href="specs/opencl-2.2-extension.pdf">PDF</a>)
(<a href="specs/opencl-2.2-extension.html">HTML</a>)
(May 12, 2017). </li>
<li> OpenCL 2.2 SPIR-V Environment Specification
(<a href="specs/opencl-2.2-environment.pdf">PDF</a>)
(<a href="specs/opencl-2.2-environment.html">HTML</a>)
(May 12, 2017). </li>
<li> OpenCL C++ Language Specification
(<a href="specs/opencl-2.2-cplusplus.pdf">PDF</a>)
(<a href="specs/opencl-2.2-cplusplus.html">HTML</a>)
(May 12, 2017). </li>
<li> The OpenCL 2.2 Reference Pages are not posted yet. </li>
<!--
<a href="http://www.khronos.org/registry/cl/sdk/2.2/docs/man/xhtml/">
OpenCL 2.2 Reference Pages.</a> The Docbook XML source for the
reference pages is in the <tt>sdk/2.2</tt> directory of the <a
href="https://github.com/KhronosGroup/OpenCL-Registry/">
OpenCL-Registry </a> Github repository.
-->
<li> <a href="https://www.khronos.org/files/opencl22-reference-guide.pdf">
OpenCL 2.2 Reference Guide.</a> </li>
<li> All of the following headers should be present in a directory
<tt> CL/ </tt> (or <tt> OpenCL/ </tt> on MacOS X). The single
header file <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl22/CL/opencl.h"> opencl.h </a> includes
other headers as appropriate for the target platform, and simply
including <tt> opencl.h </tt> should be all that most applications
need to do.
<ul>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl22/CL/opencl.h"> opencl.h </a> -
OpenCL 2.2 Single Header File for Applications. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl22/CL/cl_platform.h"> cl_platform.h </a> -
OpenCL 2.2 Platform-Dependent Macros. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl22/CL/cl.h"> cl.h </a> -
OpenCL 2.2 Core API Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl22/CL/cl_ext.h"> cl_ext.h </a> -
OpenCL 2.2 Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl22/CL/cl_egl.h"> cl_egl.h </a> -
OpenCL 2.2 Khronos EGL Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl22/CL/cl_dx9_media_sharing.h"> cl_dx9_media_sharing.h </a> -
OpenCL 2.2 Khronos OpenCL/Direct3D 9 Media Sharing Extensions
Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl22/CL/cl_d3d10.h"> cl_d3d10.h </a> -
OpenCL 2.2 Khronos OpenCL/Direct3D 10 Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl22/CL/cl_d3d11.h"> cl_d3d11.h </a> -
OpenCL 2.2 Khronos OpenCL/Direct3D 11 Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl22/CL/cl_gl.h"> cl_gl.h </a> -
OpenCL 2.2 Khronos OpenCL/OpenGL Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl22/CL/cl_gl_ext.h"> cl_gl_ext.h </a> -
OpenCL 2.2 Vendor OpenCL/OpenGL Extensions Header File. </li>
</li>
<li> The <a href="https://www.khronos.org/registry/spir-v/"> OpenCL Extended
Instruction Set for SPIR-V</a> is included as part of the SPIR-V
registry.
</ul>
<h6> OpenCL ICD and C++ Bindings Headers </h6>
<ul>
<li> <p> The OpenCL 2.x C++ Bindings Header File, <b>cl2.hpp</b> can be
obtained from the <a
href="https://www.github.com/KhronosGroup/OpenCL-CLHPP/releases">
OpenCL-CLHPP </a> Github repository, and <a
href="https://khronosgroup.github.io/OpenCL-CLHPP/"> Doxygen
documentation</a> for the bindings is also available.
<li> <p> The OpenCL 1.x C++ Bindings Header File can also be generated from
the OpenCL-CLHPP repository, but is not currently packaged as part of
the releases built for that repo. A copy of <a href="api/2.1/cl.hpp">
cl.hpp </a> may be downloaded from the registry as well. </p> </li>
<li> <p> The original <a href="specs/opencl-cplusplus-1.2.pdf"> OpenCL 1.2
C++ Binding </a> and <a href="specs/opencl-cplusplus-1.1.pdf"> OpenCL
1.1 C++ Binding </a> Specifications for the headers are also available.
</p> </li>
<li> <p> The OpenCL Installable Client Driver (ICD) Loader can be obtained
from the <a href="https://github.com/KhronosGroup/OpenCL-ICD-Loader">
OpenCL-ICD-Loader </a> Github repository. </li>
</ul>
<h6> Older Specifications </h6>
<p> Older versions of OpenCL provided for reference. </p>
<p> OpenCL 2.1 </p>
<ul>
<li> OpenCL 2.1 API
<a href="specs/opencl-2.1.pdf">
Specification </a> (November 11, 2015). </li>
<li> OpenCL 2.1 Extensions
<a href="specs/opencl-2.1-extensions.pdf">
Specification </a> (November 5, 2015). </li>
<li> OpenCL 2.1 Environment
<a href="specs/opencl-2.1-environment.pdf">
Specification</a>. </li>
<li> <a href="http://www.khronos.org/registry/cl/sdk/2.1/docs/man/xhtml/">
OpenCL 2.1 Reference Pages.</a>
<li> <a href="http://www.khronos.org/registry/cl/sdk/2.1/docs/OpenCL-2.1-refcard.pdf">
OpenCL 2.1 Quick Reference Card.</a> </li>
<li> All of the following headers should be present in a directory
<tt> CL/ </tt> (or <tt> OpenCL/ </tt> on MacOS X). The single
header file <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl21/CL/opencl.h"> opencl.h </a> includes
other headers as appropriate for the target platform, and simply
including <tt> opencl.h </tt> should be all that most applications
need to do.
<ul>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl21/CL/opencl.h"> opencl.h </a> -
OpenCL 2.1 Single Header File for Applications. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl21/CL/cl_platform.h"> cl_platform.h </a> -
OpenCL 2.1 Platform-Dependent Macros. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl21/CL/cl.h"> cl.h </a> -
OpenCL 2.1 Core API Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl21/CL/cl_ext.h"> cl_ext.h </a> -
OpenCL 2.1 Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl21/CL/cl_egl.h"> cl_egl.h </a> -
OpenCL 2.1 Khronos EGL Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl21/CL/cl_dx9_media_sharing.h"> cl_dx9_media_sharing.h </a> -
OpenCL 2.1 Khronos OpenCL/Direct3D 9 Media Sharing Extensions
Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl21/CL/cl_d3d10.h"> cl_d3d10.h </a> -
OpenCL 2.1 Khronos OpenCL/Direct3D 10 Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl21/CL/cl_d3d11.h"> cl_d3d11.h </a> -
OpenCL 2.1 Khronos OpenCL/Direct3D 11 Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl21/CL/cl_gl.h"> cl_gl.h </a> -
OpenCL 2.1 Khronos OpenCL/OpenGL Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl21/CL/cl_gl_ext.h"> cl_gl_ext.h </a> -
OpenCL 2.1 Vendor OpenCL/OpenGL Extensions Header File. </li>
</ul> </li>
</ul>
<h6> OpenCL 2.0 </h6>
<ul>
<li> OpenCL 2.0 API
<a href="specs/opencl-2.0.pdf">
Specification </a> (July 21, 2015). </li>
<li> OpenCL 2.0 C Language
<a href="specs/opencl-2.0-openclc.pdf">
Specification </a> (April 13, 2016). </li>
<li> OpenCL 2.0 Extension
<a href="specs/opencl-2.0-extensions.pdf">
Specification </a> (March 11, 2016). </li>
<li> <a href="http://www.khronos.org/registry/cl/sdk/2.0/docs/man/xhtml/">
OpenCL 2.0 Reference Pages.</a>
<li> <a href="http://www.khronos.org/registry/cl/sdk/2.0/docs/OpenCL-2.0-refcard.pdf">
OpenCL 2.0 Quick Reference Card.</a> </li>
<li> OpenCL 2.0 headers are structured in exactly the same fashion as
OpenCL 2.0 headers described above.
<ul>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl20/CL/opencl.h"> opencl.h </a> -
OpenCL 2.0 Single Header File for Applications. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl20/CL/cl_platform.h"> cl_platform.h </a> -
OpenCL 2.0 Platform-Dependent Macros. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl20/CL/cl.h"> cl.h </a> -
OpenCL 2.0 Core API Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl20/CL/cl_ext.h"> cl_ext.h </a> -
OpenCL 2.0 Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl20/CL/cl_egl.h"> cl_egl.h </a> -
OpenCL 2.0 Khronos EGL Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl20/CL/cl_dx9_media_sharing.h"> cl_dx9_media_sharing.h </a> -
OpenCL 2.0 Khronos OpenCL/Direct3D 9 Media Sharing Extensions
Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl20/CL/cl_d3d10.h"> cl_d3d10.h </a> -
OpenCL 2.0 Khronos OpenCL/Direct3D 10 Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl20/CL/cl_d3d11.h"> cl_d3d11.h </a> -
OpenCL 2.0 Khronos OpenCL/Direct3D 11 Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl20/CL/cl_gl.h"> cl_gl.h </a> -
OpenCL 2.0 Khronos OpenCL/OpenGL Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl20/CL/cl_gl_ext.h"> cl_gl_ext.h </a> -
OpenCL 2.0 Vendor OpenCL/OpenGL Extensions Header File. </li>
</ul> </li>
</ul>
<h6> OpenCL 1.2 </h6>
<ul>
<li> OpenCL 1.2 API and C Language
<a href="specs/opencl-1.2.pdf">
Specification </a> (November 14, 2012). </li>
<li> OpenCL 1.2 Extensions
<a href="specs/opencl-1.2-extensions.pdf">
Specification </a> (September 22, 2015). </li>
<li> <a href="http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/">
OpenCL 1.2 Reference Pages.</a>
<li> <a href="http://www.khronos.org/registry/cl/sdk/1.2/docs/OpenCL-1.2-refcard.pdf">
OpenCL 1.2 Quick Reference Card.</a> </li>
<li> OpenCL 1.2 headers are structured in exactly the same fashion as
OpenCL 2.1 headers described above.
<ul>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl12/CL/opencl.h"> opencl.h </a> -
OpenCL 1.2 Single Header File for Applications. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl12/CL/cl_platform.h"> cl_platform.h </a> -
OpenCL 1.2 Platform-Dependent Macros. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl12/CL/cl.h"> cl.h </a> -
OpenCL 1.2 Core API Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl12/CL/cl_ext.h"> cl_ext.h </a> -
OpenCL 1.2 Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl12/CL/cl_egl.h"> cl_egl.h </a> -
OpenCL 1.2 Khronos EGL Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl12/CL/cl_dx9_media_sharing.h"> cl_dx9_media_sharing.h </a> -
OpenCL 1.2 Khronos OpenCL/Direct3D 9 Media Sharing Extensions
Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl12/CL/cl_d3d10.h"> cl_d3d10.h </a> -
OpenCL 1.2 Khronos OpenCL/Direct3D 10 Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl12/CL/cl_d3d11.h"> cl_d3d11.h </a> -
OpenCL 1.2 Khronos OpenCL/Direct3D 11 Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl12/CL/cl_gl.h"> cl_gl.h </a> -
OpenCL 1.2 Khronos OpenCL/OpenGL Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl12/CL/cl_gl_ext.h"> cl_gl_ext.h </a> -
OpenCL 1.2 Vendor OpenCL/OpenGL Extensions Header File. </li>
</ul> </li>
</ul>
<h6> OpenCL 1.1 </h6>
<ul>
<li> OpenCL 1.1 API and C Language
<a href="specs/opencl-1.1.pdf">
Specification </a> (revision 44, June 1, 2011).
A
<a href="http://www.cutt.co.jp/book/978-4-87783-256-8.html">
Japanese translation </a>
of the specification is also available. </li>
<li> <a href="http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/">
OpenCL 1.1 Reference Pages.</a> </li>
<li> <a href="http://www.khronos.org/registry/cl/sdk/1.1/docs/OpenCL-1.1-refcard.pdf">
OpenCL 1.1 Reference Card.</a> </li>
<li> OpenCL 1.1 headers are structured in exactly the same fashion as
OpenCL 2.1 headers described above.
<ul>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl11/CL/opencl.h"> opencl.h </a> -
OpenCL 1.1 Single Header File for Applications. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl11/CL/cl_platform.h"> cl_platform.h </a> -
OpenCL 1.1 Platform-Dependent Macros. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl11/CL/cl.h"> cl.h </a> -
OpenCL 1.1 Core API Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl11/CL/cl_ext.h"> cl_ext.h </a> -
OpenCL 1.1 Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl11/CL/cl_d3d10.h"> cl_d3d10.h </a> -
OpenCL 1.1 Khronos OpenCL/Direct3D 10 Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl11/CL/cl_gl.h"> cl_gl.h </a> -
OpenCL 1.1 Khronos OpenCL/OpenGL Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl11/CL/cl_gl_ext.h"> cl_gl_ext.h </a> -
OpenCL 1.1 Vendor OpenCL/OpenGL Extensions Header File. </li>
</ul> </li>
</ul>
<h6> OpenCL 1.0 </h6>
<ul>
<li> OpenCL 1.0 API and C Language
<a href="specs/opencl-1.0.pdf">
Specification </a> (revision 48, October 6, 2009). </li>
<li> <a href="http://www.khronos.org/registry/cl/sdk/1.0/docs/man/xhtml/">
OpenCL 1.0 Reference Pages.</a> </li>
<li> <a href="http://www.khronos.org/registry/cl/sdk/1.0/docs/OpenCL-1.0-refcard.pdf">
OpenCL 1.0 Reference Card.</a> </li>
<li> OpenCL 1.0 headers are structured in exactly the same fashion as
OpenCL 2.1 headers described above.
<ul>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl10/CL/opencl.h"> opencl.h </a> -
OpenCL 1.0 Single Header File for Applications. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl10/CL/cl_platform.h"> cl_platform.h </a> -
OpenCL 1.0 Platform-Dependent Macros. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl10/CL/cl.h"> cl.h </a> -
OpenCL 1.0 Core API Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl10/CL/cl_ext.h"> cl_ext.h </a> -
OpenCL 1.0 Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl10/CL/cl_d3d10.h"> cl_d3d10.h </a> -
OpenCL 1.0 Khronos OpenCL/Direct3D 10 Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl10/CL/cl_gl.h"> cl_gl.h </a> -
OpenCL 1.0 Khronos OpenCL/OpenGL Extensions Header File. </li>
<li> <a href="https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/master/opencl10/CL/cl_gl_ext.h"> cl_gl_ext.h </a> -
OpenCL 1.0 Vendor OpenCL/OpenGL Extensions Header File. </li>
</ul> </li>
</ul>
<h6> Providing Feedback on the Registry </h6>
<p> Khronos welcomes comments and bug reports. To provide feedback on the
OpenCL reference pages, or on the OpenCL registry itself (such as
reporting missing content, bad links, etc.), file an issue in the <a
href="https://github.com/KhronosGroup/OpenCL-Registry/issues">
OpenCL-Registry </a> Github project. </p>
<p> Feedback on related OpenCL components can be provided as follows: </p>
<ul>
<li> <p> For the OpenCL API, C/C++ Language, and Environment Specifications,
file an issue on the
<a href="https://github.com/KhronosGroup/OpenCL-Docs">
KhronosGroup/OpenCL-Docs </a> Github repository. </p> </li>
<li> <p> For the OpenCL C header files, file an issue in the <a
href="https://github.com/KhronosGroup/OpenCL-Headers/issues">
OpenCL-Headers </a> Github project. </p> </li>
<li> <p> For the OpenCL C++ Bindings, file an issue in the <a
href="https://github.com/KhronosGroup/OpenCL-CLHPP/issues">
OpenCL-CLHPP </a> Github project.
<li> <p> For the OpenCL ICD Loader, file an issue in the <a
href="https://github.com/KhronosGroup/OpenCL-ICD-Loader/issues">
OpenCL-ICD-Loader </a> Github repository. </p> </li>
</ul>
<h6> Extension Template </h6>
<p> The <a href="extensions/template.txt"> extension template </a> for
writing an OpenCL extension specification shows the structure of
vendor extension specifications in the registry (listed below) and
serves as a guide for writing new extension specifications. The
template describes the purpose of each section in an extension
specification. </li>
<h6> Enumerant and Extension Number Registry </h6>
<p> <a href="xml/cl.xml"> cl.xml </a> is the registry of reserved OpenCL API
enumerant ranges. (Note that following this link will probably not
render sensibly in browsers, since the file is not entirely valid XML,
simply a manually updated placeholder.)</p>
<h6> <a name="otherextspecs"></a>
Extension Specifications</h6>
<?php include("extensions/clext.php"); ?>
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