1.1 2025-04-08 th 6.3.0 The Unicode Standard 1.1 Thai Industrial Standard (TIS) 1566-2541(1988) http://www.ratchakitcha.soc.go.th/DATA/PDF/2542/E/088/9.PDF Computers and the Thai Language https://lexitron.nectec.or.th/KM_HL5001/file_HL5001/Paper/Inter%20Journal/krrn_52085.pdf Thai Generation Panel experts, private communication during review for second level RFC 5891, Internationalized Domain Names in Applications (IDNA): Protocol http://tools.ietf.org/html/rfc5891