The category "<unit_mod-gapsout_null-gapsin_null>" can be expressed as follows:

<unit_mod-gapsout_null-gapsin_null>

<bearing_mod-gapsout_null-gapsin_null>

<formation_mod>

<point_location_mod-gapsout_null-gapsin_null>

<telegraphic_unit_command>

<unit_name_mod>