SYSML17 — SysML-1.6 does not leverage redefinition of 'sp:Surface' on 'Figure 9-7: Usage example of proxy and full ports'. And does not show direction of flows on Ports symbols

SysML-1.6 spec figure 'Figure 9.7 - Usage example of proxy and full ports'.

Does not leverage redefinition of sp:Surface, which is shown as redefined in many blocks but nothing is actually redefined.

Some earlier spec versions did leverage the redefinition, see also the attachment for similar done in a tool.

Also, it does not show direction of flows on the ports (but this notation is optional).