What about cell span with left inside SALT tree tables
@startsalt
{
{T
. | Internal Rules |*|* | External Rules |*|*
. | One | Two | Three | One | Two | Three
+ Employees
++ John McKane | YES | NO | NO | NO | YES | NO
++ Kate Moss | YES | NO | YES | YES | YES | NO
}
}
@endsalt
