Andrew Dunbar <[EMAIL PROTECTED]> wrote in [EMAIL PROTECTED]:">news:[EMAIL PROTECTED]:
> Now no definitions are global or > official but here's a nice link from Perl6 which does > a good job of explaining some useful terms: > > http://rf.net/~james/perli18n.html#Q2 They have got their definition of 'Coded Character Set' wrong, though. It's a mapping *from* (the subset of the) integers *to* characters, not the other way around. BTW, the Unicode glossary has some useful definitions. Here's how they define 'glyph': Glyph. (1) An abstract form that represents one or more glyph images. (2) A synonym for glyph image. In displaying Unicode character data, one or more glyphs may be selected to depict a particular character. These glyphs are selected by a rendering engine during composition and layout processing. (See also character.) Glyph Code. A numeric code that refers to a glyph. Usually, the glyphs contained in a font are referenced by their glyph code. Glyph codes may be local to a particular font; that is, a different font containing the same glyphs may use different codes. Glyph Identifier. Similar to a glyph code, a glyph identifier is a label used to refer to a glyph within a font. A font may employ both local and global glyph identifiers. A collection of global or universal glyph identifiers is defined by the Association for Font Information and Interchange (AFII). Glyph Image. The actual, concrete image of a glyph representation having been rasterized or otherwise imaged onto some display surface. Glyph Metrics. A collection of properties that specify the relative size and positioning along with other features of a glyph. Grapheme. (1) A minimally distinctive unit of writing in the context of a particular writing system. For example, b and d are distinct graphemes in English writing systems because there exist distinct words like big and dig. Conversely, a lowercase italiform letter a and a lowercase Roman letter a are not distinct graphemes because no word is distinguished on the basis of these two different forms. A grapheme is for a writing system what a phoneme is for a phonology. (2) What a user thinks of as a character. Graphic Character. (1) A character typically associated with a visible display representation. (See also glyph.) (2) Any character that is not primarily associated with a control or formatting function. -- Karl Ove Hufthammer
