08.2.4 Hyphens, En Dashes, Em Dashes, Numbers and Dates

i. Hyphens join words whose elements combine to give a single, compound sense, such as:

ii. En dashes join words which retain their separate meanings, such as:

En dashes should also be used to indicate a range of page numbers, dates or biblical chapters and verses. Note that, for page numbers only, the second number in a range is shortened where appropriate down to two digits (but not to one digit for numbers greater than 10); but the second number of the range is not shortened if the first ends in a zero:

iii. Em dashes are used to mark strong disjunctions. They are not spaced: