Hi, some of the ASCII characters are ambiguous in their meaning, e.g., APOSTROPHE (0x27) or HYPHEN-MINUS (0x2d). AFAIK, Unicode standard recommends to convert such code points to their most useful unambiguous interpretation, e.g., APOSTROPHE 0x27 => RIGHT SINGLE QUOTATION MARK 0x2019. In output, if existent, 0x27 should then be rendered as a vertical line instead of an apostrophe.
In node lists, that is after the above mentioned conversion, under what circumstances can glyph nodes still happen to represent ambiguous code points? Is there some input for LuaTeX that generates such glyphs other than via node list manipulation? Additionally, Unicode standard contains many code points representing various forms of spaces, such as SPACE, NON-BREAKING SPACE, THIN SPACE etc. AFAIK, traditional TeX doesn't make use of spacing characters, but always does absolute positioning of black ink in output. In node lists, under what circumstances can glyph nodes represent spacing characters? Best regards, Stephan Hennig
