I want to destroy meta items ( some K-V pairs ) on a “Weed” type Point.
Tried PUT and PATCH but can only update existing meta items.
Any help much appreciated 
[ I wonder whether I need to destroy the Point and create it anew with updated meta ? ]
@jsimmonds The meta attribute is only used by a handful of official use cases, and come to think of it, we never actually need to delete the meta items we create. Obviously, this is a pretty reasonable feature request and it ought to be implemented. I will add it to my TODO list.
In the meantime, your best option is to delete and re-create the point. Sorry!