This character set was devised by the now extinct[2]Arab Standardization and Metrology Organization in 1982[2] to be the 7-bit standard to be used in Arabic-speaking countries. The design of this character set is derived[3] from the 7-bit ISO 646 (version of 1973) but with modifications suited for the Arabic language. In code points ranging from 0x41 to 0x72 (hexadecimal), Latin letters were replaced with Arabic letters. Punctuation marks which were identical in the Latin and Arabic scripts remained the same, but where they differed (comma, semicolon, question mark), the Latin ones were replaced by Arabic ones. Only nominal letters are encoded, no preshaped forms of the letters, so shaping processing is required for display. This character set is not bidirectional and was intended to be used in right to left writing. Therefore, symmetrical punctuation marks ("(", ")", "<", ">", "[", "]", "{" and "}") appears as reversed (")", "(", ">", "<", "]", "[", "}" and "{").
There is a variant, sometimes named ASMO 449+[5] which adds the characters NBSP in 0x75, "ﹳ" in 0x76, "لآ" in 0x77, "لأ" in 0x78, "لإ" in 0x79 and "لا" in 0x7A.
Relationship with other character sets
ASMO 449 is a 7-bit character set. Although some encodings allocate this 7-bit character set in the upper part of the 8-bit character set, it should not be confused with ASMO 708. In the character sets that allocate ASMO 449 (or some variant of it) in the upper part of the 8-bit character set, the existence of apparently repeated characters is due to the fact that the characters in the lower part are for left-to-right script while the characters in the upper part are for right-to-left script. When ASMO 449 (or some variant of it) is allocated to the upper part of the 8-bit character set, it has Arabic digits.
Al-Arabi[5] adds the characters NBS in 0xF5, "-" in 0xF6, "÷" in 0xF7, "×" in 0xF8, "«" in 0xF9 and "»" in 0xFA, and replaces "ـ" with "`"; this character set is sometimes referred as Code Page 768 (not an official IBM code page).
DEC's DEC/8/ASMO[5] has the same repertoire and the same sequence of Arabic characters but dislocates them.
Apple's MacArabic adds French, German and Spanish characters in their typical code points from MacRoman, and adds letters for Persian and Urdu.
Apple's MacFarsi replaces the Arabic digits from MacArabic with Persian ones.
The Code Table 7[6] from MARC-8 allocates ASMO 449 in the lower part of the 8-bit character set and allocates the upper part with the Arabic Extension (ISO 11822 / IR 224).
Microsoft's Code page 709,[5] for MS-DOS, adds French and German characters in their typical code points from code page 437.
References
^Computing and the Qurʾān - Some caveats, 2007, Thomas Milo
^ abLe codage informatique de l'écriture arabe : d'ASMO 449 à Unicode et ISO/CEI 10646
^ ab(PDF). Archived from the original (PDF) on 2017-02-21. Retrieved 2017-02-20.
giconv a graphical interface to a patched libiconv version that recodes ASMO449+ to UTF-8
ISO 9036:1987 Information processing — Arabic 7-bit coded character set for information interchange
March 12, 2023
asmo, technologically, obsolete, coded, character, encode, arabic, language, alias, 89standard, 9036classification7, encoding, latin, modification, with, natural, letter, orderingsucceeded, byasmo, 8859, contents, history, character, relationship, with, other,. ASMO 449 is a now technologically obsolete 1 7 bit coded character set to encode the Arabic language ASMO 449Alias es iso ir 89StandardASMO 449 ISO 9036Classification7 bit encoding non Latin ISO 646 modification with natural letter orderingSucceeded byASMO 708 ISO 8859 6 vte Contents 1 History 2 Character set 3 Relationship with other character sets 4 References 5 External linksHistory EditThis character set was devised by the now extinct 2 Arab Standardization and Metrology Organization in 1982 2 to be the 7 bit standard to be used in Arabic speaking countries The design of this character set is derived 3 from the 7 bit ISO 646 version of 1973 but with modifications suited for the Arabic language In code points ranging from 0x41 to 0x72 hexadecimal Latin letters were replaced with Arabic letters Punctuation marks which were identical in the Latin and Arabic scripts remained the same but where they differed comma semicolon question mark the Latin ones were replaced by Arabic ones Only nominal letters are encoded no preshaped forms of the letters so shaping processing is required for display This character set is not bidirectional and was intended to be used in right to left writing Therefore symmetrical punctuation marks lt gt and appears as reversed gt lt and ASMO 449 was registered in the International Register of Coded Character Sets as IR 089 3 in 1985 and approved as an ISO standard as ISO 9036 1987 Information processing Arabic 7 bit coded character set for information interchange 4 Character set EditASMO 449 1982 0 1 2 3 4 5 6 7 8 9 A B C D E F0x NUL SOH STX ETX EOT ENQ ACK BEL BS HT LF VT FF CR SO SI1x DLE DC1 DC2 DC3 DC4 NAK SYN ETB CAN EM SUB ESC FS GS RS US2x SP amp 3x 0 1 2 3 4 5 6 7 8 9 gt lt 4x ء آ أ ؤ إ ئ ا ب ة ت ث ج ح خ د5x ذ ر ز س ش ص ض ط ظ ع غ 6x ـ ف ق ك ل م ن ه و ى ي 7x DELThere is a variant sometimes named ASMO 449 5 which adds the characters NBSP in 0x75 ﹳ in 0x76 لآ in 0x77 لأ in 0x78 لإ in 0x79 and لا in 0x7A Relationship with other character sets EditASMO 449 is a 7 bit character set Although some encodings allocate this 7 bit character set in the upper part of the 8 bit character set it should not be confused with ASMO 708 In the character sets that allocate ASMO 449 or some variant of it in the upper part of the 8 bit character set the existence of apparently repeated characters is due to the fact that the characters in the lower part are for left to right script while the characters in the upper part are for right to left script When ASMO 449 or some variant of it is allocated to the upper part of the 8 bit character set it has Arabic digits Al Arabi 5 adds the characters NBS in 0xF5 in 0xF6 in 0xF7 in 0xF8 in 0xF9 and in 0xFA and replaces ـ with this character set is sometimes referred as Code Page 768 not an official IBM code page DEC s DEC 8 ASMO 5 has the same repertoire and the same sequence of Arabic characters but dislocates them HP s Arabic 8 5 is also based on ASMO 449 Apple s MacArabic adds French German and Spanish characters in their typical code points from MacRoman and adds letters for Persian and Urdu Apple s MacFarsi replaces the Arabic digits from MacArabic with Persian ones The Code Table 7 6 from MARC 8 allocates ASMO 449 in the lower part of the 8 bit character set and allocates the upper part with the Arabic Extension ISO 11822 IR 224 Microsoft s Code page 709 5 for MS DOS adds French and German characters in their typical code points from code page 437 References Edit Computing and the Qurʾan Some caveats 2007 Thomas Milo a b Le codage informatique de l ecriture arabe d ASMO 449 a Unicode et ISO CEI 10646 a b 7 bit Arabic Code for Information Interchange Arab standard ASMO 449 ISO 9036 PDF Archived from the original PDF on 2017 02 21 Retrieved 2017 02 20 ISO 9036 1987 a b c d e Printronix ACA Emulation Programmer s Reference Manual Code Table 7External links Editgiconv a graphical interface to a patched libiconv version that recodes ASMO449 to UTF 8 ISO 9036 1987 Information processing Arabic 7 bit coded character set for information interchange Retrieved from https en wikipedia org w index php title ASMO 449 amp oldid 1078753444, wikipedia, wiki, book, books, library,
