anchor.diff:                      <tr>
                           <td>x_value</td>
                           <td><var>String</var></td>
  -                        <td>false</td>
  +                        <td>true: create & edit</td>
                           <td>x coordinates of points</td>                
                           <td><var>1.8</var></td>
                       </tr>			
  
positive.code:         </ol>
  
  
          <p>The ISS is 3D so x, y & z coords must be supplied!</p>
  
          <h4>parameters</h4>
  
  
negative.code:                     <tr>
                          <td>z_value</td>
                          <td><var>String</var></td>
                          <td>false</td>
                          <td>z coordinates of points</td>                
                          <td><var>1.8</var></td>
                      </tr>            
  