This, for a number of reasons, reminds me of the Tree format, see https://hackernoon.com/tree-ast-which-crushes-json-xml-yaml-toml-etc https://hackernoon.com/tr

This, for a number of reasons, reminds me of the Tree format, see https://hackernoon.com/tree-ast-which-crushes-json-xml-yaml-toml-etc https://hackernoon.com/tree-ast-which-crushes-json-xml-yaml-... and https://github.com/nin-jin/tree.d https://github.com/nin-jin/tree.d.