curly brace notation proposal for relations

I'm currently thinking of the following:

{^Mother} would display the link Mother and link the current topic to the mother of that topic.

{label$^Mother} is the same, but with a label.

{label$John^Mother} is a link to John's mother, where John is any topic name or pathname.

(Note that I used $ above in place of vertical bar, which this blog does not seem to want to publish.)

Bill