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<html><body><h2>A rectangle with opacity</h2><svg width="300" height="170" xmlns="http://www.w3.org/2000/svg">� <rect width="150" height="150" x="10" y="10" style="fill:blue;stroke:pink;stroke-width:5;opacity:0.5" /> Sorry, your browser does not support inline SVG. </svg></body></html>