3.1. Double Non-Spacing Marks

[0360]	COMBINING DOUBLE TILDE
[0361]	COMBINING DOUBLE INVERTED BREVE

There are two double diacritics added in Unicode 1.1. These marks apply to the previous base character—just like all other non-spacing marks—but hang over the following letter as well. For example:

The double diacritics always bind more loosely than other non-spacing marks, and thus sort at the end in the canonical representation. When rendering, the double diacritic will float above other diacritics (excluding surrounding diacritics).

For compatibility, character halves have been introduced for parts of these characters. They are only coded for compatibility, and their use is discouraged.

[FE22]	COMBINING DOUBLE TILDE LEFT HALF
[FE23]	COMBINING DOUBLE TILDE RIGHT HALF
[FE20]	COMBINING LIGATURE LEFT HALF
[FE21]	COMBINING LIGATURE RIGHT HALF

When converting the half-characters to the double form, there may be intervening characters.

Other multiple non-spacing marks, such as triple diacritics, are used in certain bibliographic cases. Their use and semantics will be discussed when they are introduced into Unicode.