DataWriterParameters Node1 DataWriterParameters + version + rPar + maxFileNE + maxFileMB + startIndex + compression + compLevel + theFNCB + lumiBlockNumber Node2 std::string Node2->Node1 +applicationName +streamName +streamType +project +fileNameCore +writingPath +stream Node4 std::vector< std::string > Node2->Node4 +elements Node3 std::basic_string< char > Node3->Node2 Node4->Node1 +fmdStrings