[XeTeX] Re: Trouble with XeLaTeX and Jurabib
Jonathan Kew
jonathan_kew at sil.org
Mon Feb 6 16:27:13 CET 2006
On 6 Feb 2006, at 3:06 pm, Stuart Robertson wrote:
> Thank you Jonathan,
>
> I recognise the option from the documentation but didn't understand
> what it did. Will this be the case also for Open Type fonts used
> with XeLaTeX?
>
Yes.
It'll be the case for any "standard" text fonts, as opposed to "TeX"
fonts where the replacement of -- and --- with en- and em-dash, `
with open-quote, etc., is provided by the ligature program in the TFM
file.
This was (as I understand it) DEK's way of dealing with the fact that
typical computer keyboards (and 7-bit character encodings) didn't
provide all the characters he wanted to use in typesetting: he used
ligature rules in the fonts to access some extras, and replaced a few
ASCII characters not used in normal text (like `, <, and >) with more
typographically useful ones in his "text" font encoding. Standard
fonts (outside the TeX world) don't implement these conventions, but
the tex-text mapping provides a way for them to emulate the behavior
you've come to expect.
JK
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