Nikki created this task. Herald added a subscriber: Aklapper. TASK DESCRIPTION Some quantities can be expressed exactly as fractions but only approximately as decimal values because they have recurring digits. Examples: - An inch <https://en.wikipedia.org/wiki/Inch> is exactly 1/12 of a foot but 1/12 is 0.833333... - A minute <https://en.wikipedia.org/wiki/Minute> is exactly 1/60 of an hour but 1/60 is 0.0166666... - A foot <https://en.wikipedia.org/wiki/Foot_(unit)> is exactly 1/3 of a yard but 1/3 is 0.33333... - A top quark <https://en.wikipedia.org/wiki/Top_quark> has an electric charge of exactly 2/3 e. but 2/3 is 0.66666... - A pre-decimal British halfpenny <https://en.wikipedia.org/wiki/Halfpenny_(British_pre-decimal_coin)> was worth exactly 1/480 of a pound but 1/480 is 0.020833333... - Some gramophone records <https://en.wikipedia.org/wiki/Gramophone_record> have a rotational speed of 33 1/3 rpm but 33 1/3 is 33.33333... There are also cases where values can be turned into decimal numbers but they would normally be represented as fractional quantities, e.g. the spin of a top quark is normally written 1/2 rather than 0.5 and the value of the pre-decimal halfpenny is normally written 1/2d rather than 0.5d (example of a 2½d stamp <https://commons.wikimedia.org/wiki/File:Stamp_Bermuda_1936_2.5p.jpg>). Fractions can of course be negative too, e.g. the electric charge of a strange quark <https://en.wikipedia.org/wiki/Strange_quark> is -1/3 e. I would expect to be able to input simple fractions (e.g. "1/3"), top-heavy fractions (e.g. "4/3") and mixed fractions (e.g. "33 1/3"). I would also expect Unicode fraction characters (¼ ½ ¾ ⅐ ⅑ ⅒ ⅓ ⅔ ⅕ ⅖ ⅗ ⅘ ⅙ ⅚ ⅛ ⅜ ⅝ ⅞) and the fraction slash (U+2044, e.g. "1⁄4") to be recognised when entering values on the website so that copying a value from a source which uses one of those characters does not produce an error. Previously mentioned at https://www.wikidata.org/wiki/Wikidata:Contact_the_development_team#Quantity_datatype
TASK DETAIL https://phabricator.wikimedia.org/T132291 EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/ To: Nikki Cc: Nikki, Aklapper, D3r1ck01, Izno, Wikidata-bugs, aude, Mbch331 _______________________________________________ Wikidata-bugs mailing list [email protected] https://lists.wikimedia.org/mailman/listinfo/wikidata-bugs
