Wired fontconfig behavior

Hi list,

I set alias of monospace in my ${HOME}/.fonts.conf like this:
| <alias>
| <family>monospace</family>
| <prefer>
| <family>Bitstream Vera Sans Mono</family>
| <family>FZXiYuan-M01S</family>
| </prefer>
| </alias>

but with fc-match, I found the latter have a higher position:
| gnawux@stream:~$ fc-match -s "monospace"|head
| fzyljw.ttf: "FZXiYuan-M01S" "Regular"
| VeraMono.ttf: "Bitstream Vera Sans Mono" "Roman"
| ...

where the FZXiYuan is a Chinese font. Even if I substitute FZXiYuan with another Chinese fonts and substitute bitstream with another Lattin fonts, it behaviors like above.

The same thing occured on serif and sans-serif also, however, for bitstream fonts, it works well, for instance
| <alias>
| <family>Bitstream Vera Sans Mono</family>
| <prefer>
| <family>Bitstream Vera Sans Mono</family>
| <family>FZXiYuan-M01S</family>
| </prefer>
| </alias>

and with fc-match:
| gnawux@stream:~$ fc-match -s "Bitstream Vera Sans Mono"|head
| VeraMono.ttf: "Bitstream Vera Sans Mono" "Roman"
| fzyljw.ttf: "FZXiYuan-M01S" "Regular"
 |.....

What's wrong with monospace, sans-serif, and serif?

any ideas?

Thank you!

-- 
Wang Xu


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