title: How convert XML to STEP(p21) format?
body: <p>I am new STEP and Express modeling. How can I convert XML data into STEP <code>"p21"</code> file using <code>C++ bindings</code> and CAA module? Where can I find a good tutorial for the EXPRESS modeling language? If I am missing something, suggest me to learn them. I would like someone to explain me the way we do it or show some guidelines to approach the problem.</p>