+ if (values[0].length() > 0)
+ w.header.assign(values[0], boost::regex_constants::icase);
+ if (values[1].length() > 0)
+ w.attr.assign(values[1], boost::regex_constants::icase);
+ if (values[2].length() > 0)
+ w.tag.assign(values[2], boost::regex_constants::icase);