[Xsltforms-support] Submitting xf:select with underscores separated values?

[Grégoire C. <gco...@gm...>]

Hi,

The XForms 1.1 recommentation says that when multiple values from a
<xf:select> are sent, they are separated with spaces. Is it possible to
modify this to get underscore instead of spaces? If so, how?

Thank you,
Grégoire