code: public Map<String, String> getRdfa() {
  
          if (m_rdfa == null) {
              m_rdfa = CmsCollectionsGenericWrapper.createLazyMap(new CmsRdfaTransformer());
          }
          return m_rdfa;
      }
docs: Returns a lazy initialized Map that provides the RDFA for nested sub values.<p>
  
  The provided Map key is assumed to be a String that represents the relative xpath to the value.<p>
  
  @return a lazy initialized Map that provides the RDFA for nested sub values