The embedded svg document is sourced from a file.
This is the content of the svg-file:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!-- Created with Inkscape (http://www.inkscape.org/) -->
<svg
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:cc="http://creativecommons.org/ns#"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:svg="http://www.w3.org/2000/svg"
xmlns="http://www.w3.org/2000/svg"
xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
width="64px"
height="64px"
id="svgPic"
version="1.1"
inkscape:version="0.48.4 r9939"
sodipodi:docname="New document 18">
<g
id="curvLayer"
inkscape:label="Curv"
inkscape:groupmode="layer">
<path
style="fill:none;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
d="M 2.0162099,44.937652 C 19.928085,44.362124 23.033712,29.671999 33.839655,29.657316 44.913406,29.332988 44.178722,15.232728 60.486296,15.244392"
id="path4373"
inkscape:connector-curvature="0"
sodipodi:nodetypes="ccc" />
</g>
</svg>
Below you can find some HTML and JavaScript code where an attempt is made to manipulate the svg using d3 library, however without success.
<body>
<embed src="berg4.svg" type="image/svg+xml" id="svgpic"/>
<script type="text/javascript" src="http://mbostock.github.com/d3/d3.js"></script>
<script type="text/javascript" charset="utf-8">
var subdoc = document.getElementById("svgPic").getSVGDocument();
var curvLayer = subdoc.getElementById("curvLayer");
var myPoint = d3.select("#curvLayer").append("svg:circle")
.attr("cx", x) //e.g. x = 100
.attr("cy", y) //e.g. y = 100
.attr("r", 4.5);
</script>
</body>
The main question posed here is how to introduce a new element such as a circle into this svg?