code: function shorthandFromCodesystem(cs) {
    if (!cs) {
      return '';
    }
  
    if (shorthands[cs]) {
      return shorthands[cs];
    } else if (cs.match(/http:\/\/standardhealthrecord.org\/shr\/[A-Za-z]*\/cs\/(#[A-Za-z]*CS)/)) {
      return '';
    } else {
      return cs;
    }
  }
docs: Converts a code system URI to a shorthand symbol.
  
  This contains popularly used shorthands. For other code systems,
  it will generate a generic shorthand.
  
  For URI's that match the project's URL, we omit a shorthand as
  that is unnecessary in CIMPL 5.
  
  @todo Aggregate generic shorthands
  @todo Convert shr.org to config project URL
  
  @param {uri} cs - the code system's URI
  @returns {string} Shorthand symbol for code system URI