Yaml is a data storage format

I have literally never seen yaml used as a data storage format, only as a configuration language. Ansible, Kubernetes, Home manager, netplan, and many, many other examples of yaml as a configuration language, but I cannot think of an example of yaml as a data storage format off the top of my head.

Given the:

package {
  name my-pkg
  version "1.2.3"

  dependencies {
    // Nodes can have standalone values as well as
    // key/value pairs.
    lodash "^3.2.1" optional=#true alias=underscore
  }

On the README of the KDL Github, it looks like KDL has a similar goal to be a configuration langauge, rather than a data storage format.