code: private void processAttributes(final String qName, final Attributes atts, final AttributesImpl res) {
          final int attsLen = atts.getLength();
          for (int i = 0; i < attsLen; i++) {
              final QName attQName = new QName(atts.getURI(i), atts.getLocalName(i));
              final String origValue = atts.getValue(i);
              String attValue = origValue;
              if (ATTRIBUTE_NAME_CONREF.equals(attQName.getLocalPart())) {
                  attValue = replaceHREF(QName.valueOf(ATTRIBUTE_NAME_CONREF), atts).toString();
              } else if (ATTRIBUTE_NAME_HREF.equals(attQName.getLocalPart()) || ATTRIBUTE_NAME_COPY_TO.equals(attQName.getLocalPart())) {
                  if (atts.getValue(ATTRIBUTE_NAME_SCOPE) == null ||
                          atts.getValue(ATTRIBUTE_NAME_SCOPE).equals(ATTR_SCOPE_VALUE_LOCAL)) {
                      attValue = replaceHREF(attQName, atts).toString();
                  }
              } else if (ATTRIBUTE_NAME_FORMAT.equals(attQName.getLocalPart())) {
                  final String format = atts.getValue(ATTRIBUTE_NAME_FORMAT);
                  final String scope = atts.getValue(ATTRIBUTE_NAME_SCOPE);
                  // verify format is correct
                  if (isFormatDita(format) && (scope == null || scope.equals(ATTR_SCOPE_VALUE_LOCAL))) {
                      attValue = ATTR_FORMAT_VALUE_DITA;
                      if (!format.equals(ATTR_FORMAT_VALUE_DITA)) {
                          XMLUtils.addOrSetAttribute(res, DITA_OT_NS, ATTRIBUTE_NAME_ORIG_FORMAT, DITA_OT_NS_PREFIX + ":" + ATTRIBUTE_NAME_ORIG_FORMAT, "CDATA", format);
                      }
                  }
              } else {
                  attValue = getAttributeValue(qName, attQName, attValue);
              }
              XMLUtils.addOrSetAttribute(res, atts.getURI(i), atts.getLocalName(i), atts.getQName(i), atts.getType(i), attValue);
          }
      }
docs: Process attributes
  
  @param qName element name
  @param atts input attributes
  @param res attributes to write to