The period is used as me'o denpa bu and as me'o pi. It is not used for ending sentences, since most sentences begin with .i, which begins with a period.
The comma is used as me'o slaka bu and sometimes between words. The Flatland translation uses a comma where three terminators have been elided. (Was this done automatically by a parser, or did the translator figure out where this comma would be used? It seems like a difficult criterion to apply. Where can the Flatland translation be found?) Some people use a semicolon for this.Note that if you write a comma between words and a denpa is needed, you must write the period also. Omitting the period, but putting the comma, means that the words are run together in pronunciation.Another possible use is as the equivalent of the hyphen which is written when the end of a line falls in the middle of a word.
Used at the end of a bridi question, or on the question word.
Used with lu" ... "li'u, lo'u" ... "le'u, and zoi gy" ... "gy. Pronounced as a denpa.
One possible use is to mark abbreviations, e.g. ta kg- li 43. Another possible use is to mark that the end of a line is in the middle of a word.