SYSML2 — Spatial links can be occurrences

Clause 9.2.4.1 (Occurrences Overview), under Temporal and Spatial Associations, describes temporal/spatial relations between occurrences, such as HappensBefore/Outside and HappensDuring/InsideOf, then says:

The Links above to do not take up time or space, they are temporal and spatial relations between things that do (they are disjoint with LinkObject, see 9.2.5.1).

but

• Some links can be occurrences without being link objects (LinkObject specializes of Link and Object, but does not intersect them).

• Spatial links are not disjoint with LinkObject or Occurrence in the libraries.