title: Can I create a flow chart (no tree chart) using D3.js
body: <p>can I create a flowchart like this one:
  <img src="https://i.stack.imgur.com/OVmOR.png" alt="enter image description here"></p>
  
  <p>starting form a json object using the <a href="http://d3js.org/" rel="noreferrer">D3.js</a> library?</p>
  
  <p>What should the json structure look like?</p>
  
  <p>Have you got any example I can analyse?</p>
  
  <p>Thank you very much.</p>