• Framework/visualisation library for building data-driven graphics
• using open web standards
• familiar conventions
• Works with modern browsers (>IE9).
• CSS-like selector format
• JQuery like function chaining
• easy parsing of data : texte, json, html, csv, tsv
• data binding
• advanced interaction
• built-in physics engine
• click & drag behaviour + touch

d3.select("greeting")
  .html("<h2>Hello</h2>);

d3.selectAll("ul li")
  .html("item");

d3.select("#graph")
  .append("svg")
    .attr("height", 100)
    .append("circle")
    .style("fill", "red")
    .attr("r", 40)
    .attr("cx", 50)
    .attr("cy", 50)

<code> d3.json(“http://url.com”, function() {

// callback to process the data

} <code>