Count of the Unicode/UFFF0 characters
Characters U+FFF0 with U+FFFF.
SpecialCharacters U+FFF9 with U+FFFB are special layout characters intended to frame annotation interlinear (out of the principal text). Their effect on the presentation can vary, of a simple notation ruby making it possible to annotate texts ideographic in top of the base line (in a horizontal presentation) or at side (in vertical presentation), until the complete absence of effect (annotations mixing then with the principal text), or with the total suppression of these annotations. Their use is not recommended.
Characters U+FFFC and U+FFFD are graphic characters of substitution, making it possible to replace missing characters. Many font faces contain a sign for the character coded U+FFFD, used when the police force does not contain a glyphe for a given character. These two characters do not have of semantics defined in any language, and are treated like symbols. Their soft copy can vary from one font face to another (U+FFFD is often represented by a small empty rectangle, or a white question mark in a black rhombus).
The points of code U+FFFE and U+FFFF are reserved by the standard Unicode for an internal use and are not assigned to a character. These points of code are valid only separately (for internal treatments with the applications or as nondisplayable special markers), they should be used in no text in conformity with Unicode, because they are not characters, and they could pose problems of interworking or incompatibilities during the transmission of texts between heterogeneous systems.
Count of the characters
- Table of the characters Unicode (F000-FFFF)
- Table of the characters Unicode
- Specials, table on the Unicode site (document pdf).
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