Specifying a font for special characters in XeLaTeX

[Peter Flynn]

This document works perfectly with XeLaTeX:

\documentclass{article}
\usepackage{fontspec}
\usepackage{libertine}
\begin{document}
Conventionally, early-development (α) or pre-release
(β) versions of software start at version zero.
\end{document}

(those characters in parentheses are an alpha and a beta, for those on
7-bit connections.)

If I use a different typeface, however, say plex-serif, which has no
Greek characters, of course I get to alpha and beta.

Is it possible to specify a font or face that can be used when there is
no character in the default font, *without* adding markup to the text of
the document?

Of course it's possible to change the alpha and beta to $\alpha$ and
$\beta$ or to \somespecialcommand{α} that will test for a missing glyph
or something, but I don't know enough about how XeLaTeX categorises
non-Roman characters in order to find a font which has them.

///Peter

[Ulrike Fischer]

Post by Peter Flynn
\documentclass{article}
\usepackage{fontspec}
\usepackage{libertine}
\begin{document}
Conventionally, early-development (α) or pre-release
(β) versions of software start at version zero.
\end{document}
(those characters in parentheses are an alpha and a beta, for those on
7-bit connections.)
If I use a different typeface, however, say plex-serif, which has no
Greek characters, of course I get to alpha and beta.
Is it possible to specify a font or face that can be used when there is
no character in the default font, *without* adding markup to the text of
the document?

See
https://tex.stackexchange.com/questions/323575/how-can-i-specify-a-chain-of-fallback-fonts-in-xelatex
and also the questions linked in the question.

[Peter Flynn]

On 07/02/18 10:27, Ulrike Fischer wrote:
[...]

Post by Ulrike Fischer
See
https://tex.stackexchange.com/questions/323575/how-can-i-specify-a-chain-of-fallback-fonts-in-xelatex
and also the questions linked in the question.

Ah, thank you. I was missing the words fallback and chain.

P