this ensures that all images, even in AKN HTML, have the correct URL including the document's full expression FRBR URI.
Otherwise, for a document URL such as http://localhost:8001/akn/za/act/1996/constitution/eng@2013-08-23 the image url media/foo.png becomes http://localhost:8001/akn/za/act/1996/constitution/media/foo.png which is not correct.
this ensures that all images, even in AKN HTML, have the correct URL including the document's full expression FRBR URI.
Otherwise, for a document URL such as
http://localhost:8001/akn/za/act/1996/constitution/eng@2013-08-23the image urlmedia/foo.pngbecomeshttp://localhost:8001/akn/za/act/1996/constitution/media/foo.pngwhich is not correct.