[Devel] port-props extension (rescued "extended port information" extension)

[David Robillard]

Hi all,

I rescued the "extended port information" extension from the old wiki
dump.  It was a quasi-turtle document (bad syntax) that seemed extremely
stale but useful, so I figured it'd be good to clean it up and keep it
maintained with the others.

This does mean a different URI.  I am not sure who is currently using
this. ?

-dr