At 12:32 PM 11/28/01 +0100, Marco Cimarosti wrote: >I don't think that Unicode requires that a non spacing mark *has* to be >placed on something in order to be displayable. However, some fonts may >chose to represent a stand-alone non spacing mark as floating on some >default glyph, for either technological or esthetic reasons.
As for example at the beginning of a string. If it's not at the beginning, it is *always* placed on something, i.e. whatever it is preceded by, whether that's intended or not. That's the reason for the rule about using a space (or NB space), which can be found in section 7.9 (p180 of Unicode 3.0). A./
