anchor.diff:                      <option value="abstract" <%= field2.equals("abstract") ? "selected" : "" %>>Abstract</option>
                       <option value="series" <%= field2.equals("series") ? "selected" : "" %>>Series</option>
                       <option value="sponsor" <%= field2.equals("sponsor") ? "selected" : "" %>>Sponsor</option>
  -                    <option value="identifier" <%= field2.equals("identifier") ? "selected" : "" %>>ISSN/ISBN</option>
  +                    <option value="identifier" <%= field2.equals("identifier") ? "selected" : "" %>>Identifier</option>
                     </select>
              </td>
               <td align="left" valign="top" nowrap width="68%">
  
positive.code:                     <option value="abstract" <%= field1.equals("abstract") ? "selected" : "" %>>Abstract</option>
                      <option value="series" <%= field1.equals("series") ? "selected" : "" %>>Series</option>
                      <option value="sponsor" <%= field1.equals("sponsor") ? "selected" : "" %>>Sponsor</option>
                      <option value="identifier" <%= field1.equals("identifier") ? "selected" : "" %>>ISSN/ISBN</option>
                    </select>
                  </p>
              </td>
  
negative.code:                     <option value="abstract" <%= field3.equals("abstract") ? "selected" : "" %>>Abstract</option>
                      <option value="series" <%= field3.equals("series") ? "selected" : "" %>>Series</option>
                      <option value="sponsor" <%= field3.equals("sponsor") ? "selected" : "" %>>Sponsor</option>
                      <option value="identifier" <%= field3.equals("identifier") ? "selected" : "" %>>Identifier</option>
                    </select>
                    <br>
              </td>
  