Editing Collation (section)

===Issues with numbers===
Sometimes, it is desired to order text with embedded numbers using proper numerical order. For example, "Figure 7b" goes before "Figure 11a", even though '7' comes after '1' in [[Unicode]]. This can be extended to [[Roman numeral]]s. This behavior is not particularly difficult to produce as long as only integers are to be sorted, although it can slow down sorting significantly. For example, [[Microsoft Windows]] does this when sorting [[file name]]s.

Sorting decimals properly is a bit more difficult, because different locales use different symbols for a [[decimal separator|decimal point]], and sometimes the same character used as a [[Decimal mark|decimal point]] is also used as a separator, for example "Section 3.2.5". There is no universal answer for how to sort such strings; any rules are application dependent.