Support for cyclic data about edn HOT 2 OPEN

The Common Lisp reader lets you tag anything with a number like #1= and then reference it later with #1#. It's neat, though I've used it maybe once ever. The arbitrary references make it easy to refer to other objects at any level of the hierarchy, and I suspect it minimizes the performance cost you mention, as the reader only needs to keep references to objects which were explicitly tagged.

But as cool as it is, I'm not sure I see the value for EDN, which says it's purely "for the conveyance of values", not objects. Doesn't cyclic data only make sense in the context of objects?

from edn.

says it's purely "for the conveyance of values", not objects

Depends how you define values and objects I guess. But whenever one thing has a relationship with another thing the later usually has a relationship with the former too. e.g books have authors and authors have books.

from edn.