ucedResolution" |
          "PyramidLayer" | "Preview" | "VolumeSlice" | "ObjectView" |
          "Panorama" | "AnimationFrame" | "TransparencyMask" |
          "CompositingLayer" | "SpectralSlice" | "Unknown") #REQUIRED&gt;

      &lt;!ELEMENT "ImageCreationTime" EMPTY&gt;
        &lt;!-- The time of image creation --&gt;
        &lt;!ATTLIST "ImageCreationTime" "year" #CDATA #REQUIRED&gt;
          &lt;!-- The full year (e.g., 1967, not 67) --&gt;
          &lt;!-- Data type: Integer --&gt;
        &lt;!A