Section 4.2 mentions an SVG requirement, but that requirement actually
mentions html:img - so where is this described? Would this be
equivalent to section 4.1 Scalable Foreground Icon Object (i.e. does a
html:object referencing an SVG document and a html:img referencing an
SVG document do the exact same thing?). If html:object and html:img
are interchangeable, this will require significant updates throughout
the document (i.e. "object" is replaced with "object/img").