Indeed, the otherwise operator as proposed has the desired effect

(A otherwise B otherwise C ) === ((A otherwise B) otherwise C) === (A
otherwise (B otherwise C))

Michael Kay
Saxonica

> On 21 Sep 2020, at 14:26, Chris Papademetrious
christopher.papademetrious@xxxxxxxxxxxx
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> Good point. Perhaps this could be handled by chaining them?
>
> $a otherwise $b otherwise $c otherwise $default
>
> - Chris