description: |
Used to make the address that the category points to be 'used' by references of
the type query, selection and masking. These special reference types look for
subcategories at any depth, yet in the same file flagged with '@' at the address
that the category points to. When they encounter more '$'-flagged categories
there, the target addresses of the corresponding categories are also evaluated,
in a recursive fashion.
|
format: | $ |
example: | ** sport.dii Sport /$Ball Sports -> ballsports.dii /$Motor Sports -> motorsports.dii Car Sports +> /Sport # wheels >= 4 % ** motorsports.dii /@Formula 1 p: wheels = 4 /@Motor Racing p: wheels = 2 /@Rally p: wheels = 4 % |