keep.relative.image.uris — Should image URIs be resolved against xml:base?
<xsl:param name="keep.relative.image.uris" select="0"/>
If non-zero, relative URIs (in, for example
fileref attributes) will be used in the generated
output. Otherwise, the URIs will be made absolute with respect to the
base URI.
Note that the stylesheets calculate (and use) the absolute form for some purposes, this only applies to the resulting output.