Comma certain homonyms. The comma therefore functions as a silent letter in a handful of Greek words, principally distinguishing ("ó,ti", "whatever") from ("óti", "that"). The enumeration or ideographic comma——is used in Chinese, Japanese punctuation, and somewhat in Korean punctuation. In the People's Republic of China and in North/South Korea, this comma ( , , "dùnhào") is usually used only to separate items in lists, while in Japan it is the more common form of comma (, "tōten", "clause mark"). In documents that mix Japanese and Latin scripts, the full-width comma () is used; this is the standard form of comma (
Punctuation and the "exclamation comma". The "question comma" has a comma instead of the dot at the bottom of a question mark, while the "exclamation comma" has a comma in place of the point at the bottom of an exclamation mark. These were intended for use as question and exclamation marks within a sentence, a function for which normal question and exclamation marks can also be used, but which may be considered obsolescent. The patent application entered into the national phase only in Canada. It was advertised as lapsing in Australia on 27 January 1994 and in Canada on 6 November