esolution information whenever possible to determine
        the image's intrinsic size. This size is used during the layout process when it is not
        superseded by an explicit size on fo:external-graphic (content-width and content-height 
        properties).
      </p>
<p>
        Please note that not all images contain resolution information. If it's not available
        the source resolution set on the FopFactory (or through the user configuration XML) is used.
        The default here is 72 dpi.
