ISO/IEC 8859-11

ISO/IEC 8859-11:2001, Information technology — 8-bit single-byte coded graphic character sets — Part 11: Latin/Thai alphabet, is part of the ISO/IEC 8859 series of ASCII-based standard character encodings, first edition published in 2001. It is informally referred to as Latin/Thai. It is nearly identical to the national Thai standard TIS-620 (1990). The sole difference is that ISO/IEC 8859-11 allocates non-breaking space to code 0xA0, while TIS-620 leaves it undefined. (In practice, this small distinction is usually ignored.)

ISO-8859-11 is not a registered IANA charset name despite following the normal pattern for IANA charsets based on the ISO 8859 series. However, the close equivalent TIS-620 (which lacks the non-breaking space) is registered with IANA, and can without problems be used for ISO/IEC 8859-11, since the no-break space has a code which was unallocated in TIS-620. Microsoft has assigned code page 28601 a.k.a. Windows-28601 to ISO-8859-11 in Windows. A draft had the Thai letters in different spots.^[1]

As with all varieties of ISO/IEC 8859, the lower 128 codes are equivalent to ASCII. The additional characters, apart from no-break space, are found in Unicode in the same order, only shifted from 0xA1 to U+0E01 and so forth.

The Microsoft Windows code page 874 as well as the code page used in the Thai version of the Apple Macintosh, MacThai, are extensions of TIS-620 — incompatible with each other, however. Unicode and UTF-8 are preferred in modern applications. 0.1% of all web pages use Windows-874 in February 2016.^[2][3]

Character set

Legend:

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

Code page 874

Code page 874, which is also known as CP874 and IBM874, differs from ISO/IEC 8859-11 only eight symbols as shown in the following table:

Legend:

Code page 1161

Code page 1161, which is also known as CP1161 and IBM1161, is a variant of Code page 874. The only difference is the euro sign (€) in position DE_hex (222).

Code page 1162

Code page 1162, which is also known as windows-874, CP1162, IBM1162, MS874, x-windows-874, and x-IBM874, used by Microsoft Windows differs from ISO/IEC 8859-11 only nine symbols as shown in the following table:

See also

• LMBCS-11

References

External links

• ISO/IEC 8859-11:2001
• ISO/IEC 8859-11:1999 - 8-bit single-byte coded graphic character sets, Part 11: Latin/Thai character set (draft dated June 22, 1999; superseded by ISO/IEC 8859-11:2001, published December 15, 2001)
• Windows code page 874
• MacThai code page
• ISO-IR 166 Thai character set (July 13, 1992, from Thai Standard TIS 620-2533 (1990))
• Standardization and Implementations of Thai Language PDF 175k