how to modify a svg displayed svgcanvas

[socke]

hello everybody,   i have a "map.svg"  file displayed in a jsvgcanvas.how can i add the following xml code (point.svg), which describes a point and a text, into the xml code of "map.svg", or how can i connect these two files together ?     <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">      <ellipse cx="50" cy="50" rx="20" ry="20" style="fill: #F00">      </ellipse>           <text x="13" y="54" style="fill: #F090; font-size: 14px">                Source!           </text> </svg>     Regards , Freddy