t;
          &lt;!-- Data type: Integer --&gt;

      &lt;!ELEMENT "VerticalScreenSize" EMPTY&gt;
        &lt;!-- The height, in pixels, of the raster display into which the
             image should be rendered --&gt;
        &lt;!ATTLIST "VerticalScreenSize" "value" #CDATA #REQUIRED&gt;
          &lt;!-- Data type: Integer --&gt;

    &lt;!ELEMENT "Document" (FormatVersion?, SubimageInterpretation?,
      ImageCreationTime?, ImageModificationTime?)&gt;
      &lt;!-- Document information --&gt;

      &lt;