title: PL1 structure assignment with BY NAME option at runtime or compilation
body: <p>In PL1 it is possible to assign a structure with the option BY NAME. Is this functionality used during runtime or during compile only?</p>
  
  <p>The <a href="https://pic.dhe.ibm.com/infocenter/ratdevz/v7r5/index.jsp?topic=%2Fcom.ibm.ent.pl1.zos.doc%2Ftopics%2Fibml2d91004245.htm" rel="nofollow">IBM documentation</a> is not very helpful in this case.</p>