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      <title>AP203 CC4 to NX</title>
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      <div class="title_topic4" id="xps10_pagetitle">AP203 CC4 to NX</div>
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      <div class="title_division">Class 4 &ndash; Manifold surfaces with topology (for configuration management data, see Class 1)</div>
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               <p class="para_th">STEP Entity</p>
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               <p class="para_th">NX Entity</p>
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               <p class="para_th">Notes</p>
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               <p class="para_td">manifold_surface_shape_representation&rarr;shell_based_surface_model</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top"></td>
            <td bgcolor="#f7f7f7" colspan="3" rowspan="1" valign="top">
               <p class="para_td">1</p>
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               <p class="para_td">closed_shell</p>
               <p class="para_td">open_shell</p>
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            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">shell</p>
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            <td bgcolor="#f7f7f7" colspan="3" rowspan="1" valign="top"></td>
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            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">advanced_face</p>
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               <p class="para_td">face</p>
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               <p class="para_td">&nbsp; b_spline_surface (all subtypes)</p>
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            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">&nbsp; B-surface</p>
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               <p class="para_td">2, 6</p>
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               <p class="para_td">&nbsp; conical_surface</p>
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               <p class="para_td">&nbsp; cone</p>
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            <td bgcolor="#f7f7f7" colspan="3" rowspan="1" valign="top"></td>
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               <p class="para_td">&nbsp; cylindrical_surface</p>
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            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">&nbsp; cylinder</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="3" rowspan="1" valign="top"></td>
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               <p class="para_td">&nbsp; plane</p>
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            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">&nbsp; plane</p>
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            <td bgcolor="#f7f7f7" colspan="3" rowspan="1" valign="top"></td>
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               <p class="para_td">&nbsp; spherical_surface</p>
            </td>
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               <p class="para_td">&nbsp; sphere</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="3" rowspan="1" valign="top"></td>
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               <p class="para_td">&nbsp; toroidal_surface</p>
            </td>
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               <p class="para_td">&nbsp; torus</p>
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               <p class="para_td">&nbsp; surface_of_revolution</p>
            </td>
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               <p class="para_td">&nbsp; surface_of_</p>
               <p class="para_td">&nbsp; revolution</p>
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               <p class="para_td">8</p>
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               <p class="para_td">&nbsp; surface_of_linear_extrusion</p>
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            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">&nbsp; extruded_surface</p>
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               <p class="para_td">9</p>
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               <p class="para_td">face_bound&rarr;edge_loop</p>
               <p class="para_td">face_bound&rarr;vertex_loop</p>
               <p class="para_td">face_outer_bound&rarr;edge_loop</p>
               <p class="para_td">face_outer_bound&rarr;vertex_loop</p>
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            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">loop</p>
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               <p class="para_td">oriented_edge&rarr;edge_curve</p>
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               <p class="para_td">edge</p>
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            <td bgcolor="#f7f7f7" colspan="3" rowspan="1" valign="top"></td>
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               <p class="para_td">&nbsp; b_spline_curve(all subtypes)</p>
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               <p class="para_td">&nbsp; b-curve</p>
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               <p class="para_td">3, 7</p>
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               <p class="para_td">&nbsp; circle</p>
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               <p class="para_td">&nbsp; circle</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="3" rowspan="1" valign="top"></td>
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               <p class="para_td">&nbsp; ellipse</p>
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               <p class="para_td">&nbsp; ellipse</p>
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            <td bgcolor="#f7f7f7" colspan="3" rowspan="1" valign="top"></td>
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               <p class="para_td">&nbsp; hyperbola</p>
            </td>
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               <p class="para_td">&nbsp; b-curve</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="3" rowspan="1" valign="top"></td>
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               <p class="para_td">&nbsp; line</p>
            </td>
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               <p class="para_td">&nbsp; line</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="3" rowspan="1" valign="top"></td>
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               <p class="para_td">&nbsp; parabola</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">&nbsp; b-curve</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="3" rowspan="1" valign="top"></td>
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               <p class="para_td">&nbsp; polyline</p>
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               <p class="para_td">&nbsp; line</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="3" rowspan="1" valign="top">
               <p class="para_td">5</p>
            </td>
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               <p class="para_td">&nbsp; intersection_curve</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">&nbsp; &ndash;</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="3" rowspan="1" valign="top">
               <p class="para_td">4</p>
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            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">&nbsp; seam_curve</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">&nbsp; &ndash;</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="3" rowspan="1" valign="top">
               <p class="para_td">4</p>
            </td>
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            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">&nbsp; surface_curve</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">&nbsp; &ndash;</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="3" rowspan="1" valign="top">
               <p class="para_td">4</p>
            </td>
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            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">vertex_point</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">vertex</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="3" rowspan="1" valign="top"></td>
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            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">&nbsp; Cartesian_point</p>
            </td>
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               <p class="para_td">&nbsp; point</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="3" rowspan="1" valign="top"></td>
         </tr>
      </table><br><p class="para_division">NOTES</p>
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               <p class="para_td">Note 1</p>
            </td>
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               <p class="para_td">Generates no specific NX entity. Just a collector for geometry entities.</p>
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            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">Note 2</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">All STEP b_spline_surface subtypes are processed into NX b-surface entities.</p>
            </td>
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            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">Note 3</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">All STEP b_spline_curve subtypes are processed into NX b-curve entities.</p>
            </td>
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            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">Note 4</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">The underlying STEP curve entity pointed to by a STEP intersection_curve, seam_curve, or surface_curve entity is processed into an appropriate NX curve entity provided said underlying STEP curve entity is a STEP b_spline_curve, circle, ellipse, hyperbola, line, parabola, or polyline.</p>
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            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">Note 5</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">The first and last point of the polyline point array are used to form a 2-point line.</p>
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               <p class="para_td">Note 6</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">Will be simplified to equivalent B-surface with weights removed or analytic cone, cylinder, plane, sphere, or torus if possible.</p>
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               <p class="para_td">Note 7</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">Will be simplified to equivalent B-curve with weights removed or analytic circle or line if possible.</p>
            </td>
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            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">Note 8</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">Will be simplified to equivalent analytic cone, cylinder, sphere, or torus if possible.</p>
            </td>
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            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">Note 9</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">Will be simplified to equivalent analytic cylinder or plane if possible.</p>
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         </tr>
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