code: public void setRdfa(String rdfa) {
  
          if (CmsStringUtil.isNotEmptyOrWhitespaceOnly(rdfa)) {
              m_rdfa = rdfa.trim();
          } else {
              m_rdfa = rdfa;
          }
      }
docs: Sets the name for the optional attribute that provides direct access to the RDFA map.<p>
  
  @param rdfa the name for the optional attribute that provides direct access to the RDFA map