r>
<tr><td class="num">27</td><td>&nbsp;</td><td><a href="http://www.opengl.org/registry/specs/NV/glx_swap_group.txt">NV_swap_group</a></td></tr>
<tr><td class="num">28</td><td>&nbsp;</td><td><a href="http://oss.sgi.com/projects/ogl-sample/registry/NV/vertex_array_range.txt">NV_vertex_array_range</a></td></tr>
<tr><td class="num">29</td><td>&nbsp;</td><td><a href="http://www.opengl.org/registry/specs/NV/glx_video_out.txt">NV_video_output</a></td></tr>
<tr><td><br></td><td></td><td></td></tr>
<tr><td cl