The YS Core YAML-Schema

The term "YAML Schema" is a bit of unfortunate history. It's not the YAML version of a JSON Schema. In my opinion it needs to be renamed because it's not a schema in the typical sense of the word. The term has been part of the YAML spec since the beginning. Let's use the term "YAML-Schema" instead of "YAML Schema" to be clear that this is not a typical schema applied to a YAML file. Typically a…