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              <!-- Basic D3js data binded circles for Wikipedia article -->
Minimal editable example for <a href="https://en.wikipedia.org/wiki/D3.js#Data-binding">Wikipedia's D3.js article#Data biding</a>
<div id="hook"></div>
              svg { background-color: #D0D0D0; }
              // Data
  var data = [
     { name:"Ireland", income:53000, life: 78, pop:6378, color: "green"},
     { name:"Norway",  income:73000, life: 87, pop:5084, color: "blue" },
     { name:"Tanzania", income:27000, life: 50, pop:3407, color: "grey" }
// Create SVG container
  var svg = d3.select("#hook").append("svg")
        .attr("width", 120)
        .attr("height", 120);
// Create SVG elements from data !
    svg.selectAll("circle")                  // create virtual circles
      .data(data)                            // bind data
    .enter()                                 // for each row...
      .append('circle')                      // bind circle & data row such as... 
        .attr("id", function(d) { return d.name })          // set the circle's id  according to the counry name
        .attr("cx", function(d) { return d.income /1000  })  // set the circle's horizontal position according to income 
        .attr("cy", function(d) { return d.life })          // set the circle's vertical position according to life expectancy 
        .attr("r",  function(d) { return d.pop /1000 *2 })  // set the circle's radius according to country's population 
        .attr("fill",  function(d) { return d.color });        // set the circle's color according to country's color
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