Example for current implementations
<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="800.0 -2000.0 1000 1000">
<globalCoordinateSystem srsName="http://purl.org/crs/84" transform="matrix(39158.46086612026,0.0,0.0,-48000.0,-5447920.867998981,1696400.0)" />
<g media="screen and (min-zoom: 0.5) and (max-zoom: 2.0)">
<iframe media="screen and (close-viewport: 10)" src="50085000-12720000-all.svg" y="0.0" x="0.0" width="326.3205072176688" height="400.0" />
<iframe media="screen and (close-viewport: 10)" src="50085000-12723000-all.svg" y="-400.0" x="0.0" width="326.3205072176688" height="400.0" />
<iframe media="screen and (close-viewport: 10)" src="50085000-12726000-all.svg" y="-800.0" x="0.0" width="326.3205072176688" height="400.0" />
<iframe media="screen and (close-viewport: 10)" src="50085000-12729000-all.svg" y="-1200.0" x="0.0" width="326.3205072176688" height="400.0" />
<iframe media="screen and (close-viewport: 10)" src="50085000-12732000-all.svg" y="-1600.0" x="0.0" width="326.3205072176688" height="400.0" />
</g>
</svg>