ISO/IEC JTC1/SC2/WG2 N1559
Date: 1997-05-01
This is an unofficial HTML version of a document submitted to WG2.
A. Administrative | |
| 1. Title | Proposal for encoding the Cham script in ISO/IEC 10646 |
| 2. Requester's name | Michael Everson, Evertype (WG2 member for Ireland) |
| 3. Requester type | Expert contribution |
| 4. Submission date | 1997-05-01 |
| 5. Requester's reference | http://www.egt.ie/standards/ch/ch.html |
| 6a. Completion | This is a complete proposal. |
| 6b. More information to be provided? | No |
B. Technical -- General | |
| 1a. New script? Name? | Yes. Cham. |
| 1b. Addition of characters to existing block? Name? | No |
| 2. Number of characters | 75 |
| 3. Proposed category | Category A |
| 4. Proposed level of implementation and rationale | Cham requires Level 2 implementation. |
| 5a. Character names included in proposal? | Yes |
| 5b. Character names in accordance with guidelines? | Yes |
| 5c. Character shapes reviewable? | Yes (see below) |
| 6a. Who will provide computerized font? | Michael Everson, Evertype |
| 6b. Font currently available? | Michael Everson, Evertype |
| 6c. Font format? | TrueType |
| 7a. Are references (to other character sets, dictionaries, descriptive texts, etc.) provided? | Yes. The authoritative Cham-Vietnamese dictionary is: Bùi Khánh Thê. 1995. Tù Ðiên Chäm-Viêt = Inulo cam-byet nam. Hô Chí Minh: Nhà Xuât Ban Khoa Hoc Xã Hôi. |
| 7b. Are published examples (such as samples from newspapers, magazines, or other sources) of use of proposed characters attached? | Not provided here. |
| 8. Does the proposal address other aspects of character data processing? | Yes (see below) |
C. Technical -- Justification | |
| 1. Contact with the user community? | No, but there is contact with TCVN. |
| 2. Information on the user community? | Cham is an official national minority in Viêt Nam. There are approximately 86,000 Cham speakers living in Viêt Nam and another estimated 150,000 in Cambodia |
| 3a. The context of use for the proposed characters? | Cham script is commonly used to write Cham. |
| 3b. Reference | ISO/IEC JTC1/SC2/WG2 N1126 |
| 4a. Proposed characters in current use? | Yes |
| 4b. Where? | In Viêt Nam and Cambodia. |
| 5a. Characters should be encoded entirely in BMP? | Yes. Positions U+1900 - U+197F are proposed for the encoding. |
| 5b. Rationale | Cham is a Category A script. |
| 6. Should characters be kept in a continuous range? | Yes |
| 7a. Can the characters be considered a presentation form of an existing character or character sequence? | No |
| 7b. Where? | |
| 7c. Reference | |
| 8a. Can any of the characters be considered to be similar (in appearance or function) to an existing character? | No |
| 8b. Where? | |
| 8c. Reference | |
| 9a. Combining characters or use of composite sequences included? | Yes |
| 9b. List of composite sequences and their corresponding glyph images provided? | No; vowel signs combine with consonants in Level 2. |
| 10. Characters with any special properties such as control function, etc. included? | No |
D. SC2/WG2 AdministrativeTo be completed by SC2/WG2 | |
| 1. Relevant SC 2/WG 2 document numbers: | N1126 |
| 2. Status (list of meeting number and corresponding action or disposition) | |
| 3. Additional contact to user communities, liaison organizations etc. | |
| 4. Assigned category and assigned priority/time frame | |
| Other Comments | |
Processing
Cham is a Brahmi-derived script. Conjunct-formation such as stacking, found in other Brahmic scripts, does not occur in Cham, though some of the consonants do have special forms when syllable-final. Rendering is therefore somewhat simpler than for other Brahmic scripts. Eight columns are required to encode Cham in Brahmic harmonization. In the code table given below, glyphs for the final consonants are given, showing how their positions can be mapped in an 8-bit font environment.
Names and code table | |
1900 (This postion shall not be used) 1901 CHAM SIGN NG 1902 CHAM SIGN ANUSVARA 1903 CHAM SIGN VISARGA 1904 (This postion shall not be used) 1905 CHAM LETTER A 1906 (This postion shall not be used) 1907 CHAM LETTER I 1908 (This postion shall not be used) 1909 CHAM LETTER U 190A (This postion shall not be used) 190B (This postion shall not be used) 190C (This postion shall not be used) 190D (This postion shall not be used) 190E (This postion shall not be used) 190F CHAM LETTER E 1910 CHAM LETTER AI 1911 (This postion shall not be used) 1912 (This postion shall not be used) 1913 CHAM LETTER O 1914 (This postion shall not be used) 1915 CHAM LETTER KA 1916 CHAM LETTER KHA 1917 CHAM LETTER GA 1918 CHAM LETTER GHA 1919 CHAM LETTER NGUE 191A CHAM LETTER CA 191B CHAM LETTER CHA 191C CHAM LETTER JA 191D CHAM LETTER JHA 191E CHAM LETTER NHUE 191F (This postion shall not be used) 1920 (This postion shall not be used) 1921 (This postion shall not be used) 1922 (This postion shall not be used) 1923 (This postion shall not be used) 1924 CHAM LETTER TA 1925 CHAM LETTER THA 1926 CHAM LETTER DA 1927 CHAM LETTER DHA 1928 CHAM LETTER NUE 1929 (This postion shall not be used) 192A CHAM LETTER PA 192B CHAM LETTER PHA 192C CHAM LETTER BA 192D CHAM LETTER BHA 192E CHAM LETTER MUE 192F CHAM LETTER YA 1930 CHAM LETTER RA 1931 (This postion shall not be used) 1932 CHAM LETTER LA 1933 (This postion shall not be used) 1934 (This postion shall not be used) 1935 CHAM LETTER VA 1936 CHAM LETTER SSA 1937 (This postion shall not be used) 1938 CHAM LETTER SA 1939 CHAM LETTER YA 193A (This postion shall not be used) 193B (This postion shall not be used) 193C (This postion shall not be used) 193D (This postion shall not be used) 193E CHAM VOWEL SIGN A 193F CHAM VOWEL SIGN I 1940 CHAM VOWEL SIGN II 1941 CHAM VOWEL SIGN U 1942 CHAM VOWEL SIGN UU 1943 (This postion shall not be used) 1944 (This postion shall not be used) 1945 (This postion shall not be used) 1946 (This postion shall not be used) 1947 CHAM VOWEL SIGN E 1948 CHAM VOWEL SIGN AI 1949 (This postion shall not be used) 194A (This postion shall not be used) 194B CHAM VOWEL SIGN O 194C CHAM VOWEL SIGN AU 194D CHAM SIGN VISARGA 194E (This postion shall not be used) 194F (This postion shall not be used) 1950 (This postion shall not be used) 1951 (This postion shall not be used) 1952 (This postion shall not be used) 1953 (This postion shall not be used) 1954 (This postion shall not be used) 1955 (This postion shall not be used) 1956 (This postion shall not be used) 1957 CHAM LETTER NGA 1958 CHAM LETTER NHA 1959 CHAM LETTER NHJA 195A CHAM LETTER NA 195B CHAM LETTER DDA 195C CHAM LETTER PPA 195D CHAM LETTER MA 195E CHAM LETTER BBA 195F (This postion shall not be used) 1960 (This postion shall not be used) 1961 (This postion shall not be used) 1962 (This postion shall not be used) 1963 (This postion shall not be used) 1964 CHAM STOP SIGN 1965 CHAM PARAGRAPH SIGN 1966 CHAM DIGIT ZERO 1967 CHAM DIGIT ONE 1968 CHAM DIGIT TWO 1969 CHAM DIGIT THREE 196A CHAM DIGIT FOUR 196B CHAM DIGIT FIVE 196C CHAM DIGIT SIX 196D CHAM DIGIT SEVEN 196E CHAM DIGIT EIGHT 196F CHAM DIGIT NINE 1970 CHAM VOWEL SIGN OE 1971 CHAM VOWEL SIGN OOE 1972 CHAM VOWEL SIGN EI 1973 CHAM VOWEL SIGN OO 1974 CHAM VOWEL SIGN EE 1975 CHAM VOWEL SIGN UE 1976 CHAM VOWEL SIGN UUE 1977 (This postion shall not be used) 1978 (This postion shall not be used) 1979 (This postion shall not be used) 197A (This postion shall not be used) 197B (This postion shall not be used) 197C (This postion shall not be used) 197D (This postion shall not be used) 197E CHAM BEGIN TEXT MARK 197F CHAM END TEXT MARK | 
|