NimYAML/doc/snippets/quickstart/04/01-in.yaml

%YAML 1.2
%TAG !n! tag:nimyaml.org,2016:
--- !n!custom:NodeObj &a
name: Node 1
left:
  name: Node 2
  left: ~
  right: &b
    name: Node 3
    left: *a
    right: ~
right: *b