Thai Industrial Standard 620-2533

Thai Industrial Standard 620-2533, commonly referred to as TIS-620, is the most common character set and character encoding for the Thai language. The standard is published by the Thai Industrial Standards Institute (TISI), an organ of the Ministry of Industry under the Royal Thai Government, and is the sole official standard for encoding Thai in Thailand. The descriptive name of the standard is "Standard for Thai Character Codes for Computers" (Thai: รหัสสำหรับอักขระไทยที่ใช้กับคอมพิวเตอร์). "2533" refers to year 2533 of the Buddhist Era (1990), the year the present version of the standard was published; a previous revision, TIS 620-2529 (1986), is now obsolete.

TIS-620 is the IANA preferred charset name for TIS-620, and that charset name is used also for ISO/IEC 8859-11 (which adds a no-break space character at 0xA0, which is unassigned in TIS-620). When the IANA name is used the codes are supplemented with the C0 and C1 control codes from ISO/IEC 6429.

Structure

TIS-620 is a conventionally structured Extended ASCII national character set that retains full compatibility with 7-bit ASCII and uses the 8-bit range hex A1 to FB for encoding the Thai alphabet. Due to the complex combining nature of Thai vowels and diacritics, TIS-620 is intended for information interchange only, and an additional display engine is required to compose characters correctly.

Variants

A nearly identical version of TIS-620 has been adopted as ISO/IEC 8859-11 in 2001, the sole difference being that ISO/IEC 8859-11 defines hex A0 as a non-breaking space, while TIS-620 leaves it undefined but reserved. (In practice, this small distinction is usually ignored.)

The ISO/IEC 8859-11 set has also been registered as ISO-IR-166 by Ecma International, but this variation adds explicit escape codes for signaling the beginning and end of Thai character sequences.

The TIS-620 character set ordering has been used essentially as is within Unicode (ISO/IEC 10646) as well. Unicode's Thai block is U+0E01 through U+0E7F, and TIS-620 Thai characters can be converted to UTF-16 simply by prefixing each byte with 0E and subtracting hex A0 from the value.

Character set

TIS-620

	_0	_1	_2	_3	_4	_5	_6	_7	_8	_9	_A	_B	_C	_D	_E	_F
0_ 0	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|
1_ 16	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|
2_ 32	Template:Chset-color-misc|SP 0020	Template:Chset-color-punct|! 0021	Template:Chset-color-punct|" 0022	Template:Chset-color-punct|# 0023	Template:Chset-color-graph|$ 0024	Template:Chset-color-punct|% 0025	Template:Chset-color-punct|& 0026	Template:Chset-color-punct|' 0027	Template:Chset-color-punct|( 0028	Template:Chset-color-punct|) 0029	Template:Chset-color-punct|* 002A	Template:Chset-color-graph|+ 002B	Template:Chset-color-punct|, 002C	Template:Chset-color-punct|- 002D	Template:Chset-color-punct|. 002E	Template:Chset-color-punct|/ 002F
3_ 48	Template:Chset-color-digit|0 0030	Template:Chset-color-digit|1 0031	Template:Chset-color-digit|2 0032	Template:Chset-color-digit|3 0033	Template:Chset-color-digit|4 0034	Template:Chset-color-digit|5 0035	Template:Chset-color-digit|6 0036	Template:Chset-color-digit|7 0037	Template:Chset-color-digit|8 0038	Template:Chset-color-digit|9 0039	Template:Chset-color-punct|: 003A	Template:Chset-color-punct|; 003B	Template:Chset-color-graph|< 003C	Template:Chset-color-graph|= 003D	Template:Chset-color-graph|> 003E	Template:Chset-color-punct|? 003F
4_ 64	Template:Chset-color-punct|@ 0040	Template:Chset-color-letter|A 0041	Template:Chset-color-letter|B 0042	Template:Chset-color-letter|C 0043	Template:Chset-color-letter|D 0044	Template:Chset-color-letter|E 0045	Template:Chset-color-letter|F 0046	Template:Chset-color-letter|G 0047	Template:Chset-color-letter|H 0048	Template:Chset-color-letter|I 0049	Template:Chset-color-letter|J 004A	Template:Chset-color-letter|K 004B	Template:Chset-color-letter|L 004C	Template:Chset-color-letter|M 004D	Template:Chset-color-letter|N 004E	Template:Chset-color-letter|O 004F
5_ 80	Template:Chset-color-letter|P 0050	Template:Chset-color-letter|Q 0051	Template:Chset-color-letter|R 0052	Template:Chset-color-letter|S 0053	Template:Chset-color-letter|T 0054	Template:Chset-color-letter|U 0055	Template:Chset-color-letter|V 0056	Template:Chset-color-letter|W 0057	Template:Chset-color-letter|X 0058	Template:Chset-color-letter|Y 0059	Template:Chset-color-letter|Z 005A	Template:Chset-color-punct|[ 005B	Template:Chset-color-punct|\ 005C	Template:Chset-color-punct|] 005D	Template:Chset-color-graph|^ 005E	Template:Chset-color-punct|_ 005F
6_ 96	Template:Chset-color-graph|` 0060	Template:Chset-color-letter|a 0061	Template:Chset-color-letter|b 0062	Template:Chset-color-letter|c 0063	Template:Chset-color-letter|d 0064	Template:Chset-color-letter|e 0065	Template:Chset-color-letter|f 0066	Template:Chset-color-letter|g 0067	Template:Chset-color-letter|h 0068	Template:Chset-color-letter|i 0069	Template:Chset-color-letter|j 006A	Template:Chset-color-letter|k 006B	Template:Chset-color-letter|l 006C	Template:Chset-color-letter|m 006D	Template:Chset-color-letter|n 006E	Template:Chset-color-letter|o 006F
7_ 112	Template:Chset-color-letter|p 0070	Template:Chset-color-letter|q 0071	Template:Chset-color-letter|r 0072	Template:Chset-color-letter|s 0073	Template:Chset-color-letter|t 0074	Template:Chset-color-letter|u 0075	Template:Chset-color-letter|v 0076	Template:Chset-color-letter|w 0077	Template:Chset-color-letter|x 0078	Template:Chset-color-letter|y 0079	Template:Chset-color-letter|z 007A	Template:Chset-color-punct|{ 007B	Template:Chset-color-graph|| 007C	Template:Chset-color-punct|} 007D	Template:Chset-color-graph|~ 007E	Template:Chset-color-undef|
8_ 128	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|
9_ 144	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|
A_ 160	Template:Chset-color-undef|	Template:Chset-color-letter|ก 0E01	Template:Chset-color-letter|ข 0E02	Template:Chset-color-letter|ฃ 0E03	Template:Chset-color-letter|ค 0E04	Template:Chset-color-letter|ฅ 0E05	Template:Chset-color-letter|ฆ 0E06	Template:Chset-color-letter|ง 0E07	Template:Chset-color-letter|จ 0E08	Template:Chset-color-letter|ฉ 0E09	Template:Chset-color-letter|ช 0E0A	Template:Chset-color-letter|ซ 0E0B	Template:Chset-color-letter|ฌ 0E0C	Template:Chset-color-letter|ญ 0E0D	Template:Chset-color-letter|ฎ 0E0E	Template:Chset-color-letter|ฏ 0E0F
B_ 176	Template:Chset-color-letter|ฐ 0E10	Template:Chset-color-letter|ฑ 0E11	Template:Chset-color-letter|ฒ 0E12	Template:Chset-color-letter|ณ 0E13	Template:Chset-color-letter|ด 0E14	Template:Chset-color-letter|ต 0E15	Template:Chset-color-letter|ถ 0E16	Template:Chset-color-letter|ท 0E17	Template:Chset-color-letter|ธ 0E18	Template:Chset-color-letter|น 0E19	Template:Chset-color-letter|บ 0E1A	Template:Chset-color-letter|ป 0E1B	Template:Chset-color-letter|ผ 0E1C	Template:Chset-color-letter|ฝ 0E1D	Template:Chset-color-letter|พ 0E1E	Template:Chset-color-letter|ฟ 0E1F
C_ 192	Template:Chset-color-letter|ภ 0E20	Template:Chset-color-letter|ม 0E21	Template:Chset-color-letter|ย 0E22	Template:Chset-color-letter|ร 0E23	Template:Chset-color-letter|ฤ 0E24	Template:Chset-color-letter|ล 0E25	Template:Chset-color-letter|ฦ 0E26	Template:Chset-color-letter|ว 0E27	Template:Chset-color-letter|ศ 0E28	Template:Chset-color-letter|ษ 0E29	Template:Chset-color-letter|ส 0E2A	Template:Chset-color-letter|ห 0E2B	Template:Chset-color-letter|ฬ 0E2C	Template:Chset-color-letter|อ 0E2D	Template:Chset-color-letter|ฮ 0E2E	Template:Chset-color-letter|ฯ 0E2F
D_ 208	Template:Chset-color-letter|ะ 0E30	Template:Chset-color-misc|◌ั 0E31	Template:Chset-color-letter|า 0E32	Template:Chset-color-letter|ำ 0E33	Template:Chset-color-misc|◌ิ 0E34	Template:Chset-color-misc|◌ี 0E35	Template:Chset-color-misc|◌ึ 0E36	Template:Chset-color-misc|◌ื 0E37	Template:Chset-color-misc|◌ุ 0E38	Template:Chset-color-misc|◌ู 0E39	Template:Chset-color-misc|◌ฺ 0E3A	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-graph|฿ 0E3F
E_ 224	Template:Chset-color-letter|เ 0E40	Template:Chset-color-letter|แ 0E41	Template:Chset-color-letter|โ 0E42	Template:Chset-color-letter|ใ 0E43	Template:Chset-color-letter|ไ 0E44	Template:Chset-color-letter|ๅ 0E45	Template:Chset-color-letter|ๆ 0E46	Template:Chset-color-misc|◌็ 0E47	Template:Chset-color-misc|◌่ 0E48	Template:Chset-color-misc|◌้ 0E49	Template:Chset-color-misc|◌๊ 0E4A	Template:Chset-color-misc|◌๋ 0E4B	Template:Chset-color-misc|◌์ 0E4C	Template:Chset-color-misc|◌ํ 0E4D	Template:Chset-color-misc|◌๎ 0E4E	Template:Chset-color-punct|๏ 0E4F
F_ 240	Template:Chset-color-digit|๐ 0E50	Template:Chset-color-digit|๑ 0E51	Template:Chset-color-digit|๒ 0E52	Template:Chset-color-digit|๓ 0E53	Template:Chset-color-digit|๔ 0E54	Template:Chset-color-digit|๕ 0E55	Template:Chset-color-digit|๖ 0E56	Template:Chset-color-digit|๗ 0E57	Template:Chset-color-digit|๘ 0E58	Template:Chset-color-digit|๙ 0E59	Template:Chset-color-punct|๚ 0E5A	Template:Chset-color-punct|๛ 0E5B	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|	Template:Chset-color-undef|

  Letter   Number   Punctuation   Symbol   Other   Undefined

In the table above, 20 is the regular SPACE character. Code values 00-1F, 7F, 80-9F, A0, DB-DE and FC-FF are not assigned to characters by TIS-620.

Code values D1, D4-DA, E7-EE are combining characters.

Further reading

• Flohr, Guido (2016) [2006]. "Locale::RecodeData::TIS_620 - Conversion routines for TIS-620". CPAN libintl-perl. 1.0. Archived from the original on 2017-01-14. Retrieved 2017-01-14. {{cite web}}: |archive-date= / |archive-url= timestamp mismatch; 2017-01-15 suggested (help)

External links

• Official reference (in Thai)
• Announcement in Royal Gazette of TIS 620-2533 and TIS 620-2529
• Mapping of TIS-620 to ISO 10646 at the Wayback Machine (archived June 5, 2013)