- From: by way of Bert Bos <choess@stwing.upenn.edu>
- Date: Tue, 12 Nov 2002 00:44:00 +0100
- To: www-style@w3.org

The following describes the behavior of four proposed additional list-style-types, all of which are algorithmic. "coptic" or "lower-coptic" and "upper-coptic" correspond to the numbering system traditionally used by the Sahidic dialect of Coptic. "upper-ionic-greek" and "lower-ionic-greek" (these names are provisional) correspond to the classical Greek numbering system, which is said to be preferred over Roman numerals for list numbering in written Greek. Lower-Coptic This is a simple additive system defined for the numbers 1-999,999. The digits are split into groups of three (if there are less than six digits, the less significant group is filled first). Within each group, appropriate digits are picked from the following list (at most one per column) and written in descending order by value (hundreds first). The characters in the more significant group are combined with U+03FF, the combining double overline. The characters in the less significant group are combined with U+0305, the combining overline. Ones Tens Hundreds 1 U+03B1 | 10 U+03B9 | 100 U+03C1 2 U+03B2 | 20 U+03BA | 200 U+03C3 3 U+03B3 | 30 U+03BB | 300 U+03C4 4 U+03B4 | 40 U+03BC | 400 U+03C5 5 U+03B5 | 50 U+03BD | 500 U+03C6 6 U+03DB | 60 U+03BE | 600 U+03C7 7 U+03B6 | 70 U+03BF | 700 U+03C8 8 U+03B7 | 80 U+03C0 | 800 U+03C9 9 U+03B8 | 90 U+03E5 | 900 U+03E1 The suffix for the coptic numbering system is a dot U+002E. Numbers outside the range of the coptic system are rendered using the decimal rendering style. Lower-Ionic-Greek This system is identical to the "lower-coptic" system, but combines the final letter in the less significant group with U+0374, the Greek numeral sign rather than the combining overline, and the final letter in the more significant group with U+0375, the greek lower numeral sign, rather than the combining double overline. Upper-Coptic This system is identical to the "lower-coptic" system but uses the following codepoints instead. Ones Tens Hundreds 1 U+0391 | 10 U+0399 | 100 U+03A1 2 U+0392 | 20 U+039A | 200 U+03A3 3 U+0393 | 30 U+039B | 300 U+03A4 4 U+0394 | 40 U+039C | 400 U+03A5 5 U+0395 | 50 U+039D | 500 U+03A6 6 U+03DA | 60 U+039E | 600 U+03A7 7 U+0396 | 70 U+039F | 700 U+03A8 8 U+0397 | 80 U+03A0 | 800 U+03A9 9 U+0398 | 90 U+03DF | 900 U+03E0 Upper-Ionic-Greek This system is identical to the "lower-ionic-greek" system but uses the codepoints of the "upper-coptic" system rather than the "coptic" system. Caveats: It might be best to describe the Coptic systems as variations on the Ionic Greek systems, as is true historically. I am not entirely certain of my description of the combining characters in the Ionic Greek systems and their position. Some sources suggest that numbers in the less significant group should use no combining symbol. I am also unsure as to whether it is correct to use the numbers 10-999 with the lower combining symbol (representing thousands). There appears to have been some use of code point U+039C as a combining modifier (!), signifying "myriad", but I have no more precise information. The code points U+03DA and U+03DB (upper- and lower-case "stigma") are orthographic successors of code points U+03DC and U+03DD (upper- and lower-case "digamma"), and the latter may in fact be more correct to use in list numbering. Input on this point is particularly welcomed from modern users of this numbering system. I am also uncertain as to whether or not the dot is the most appropriate suffix character. -- Chris Hoess

Received on Monday, 11 November 2002 18:44:04 UTC