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Re:JSON vs. YAML – try it yourself by RubyPinch on Tuesday April 07, 2015 @02:51AM (#9332349)
One thing that comes to mind is (for data interchange), it allows for custom objects to be explicitly marked as such

http://www.yaml.org/spec/1.2/spec.html#id2805712

additionally, it allows multiple top level objects in one file (which JSON can't do (not counting 3rd party modifications))

other than that, not much other use

Re:JSON vs. YAML – try it yourself by Ded7xSEoPKYNsDd on Tuesday April 07, 2015 @06:27AM (#9332946)
> additionally, it allows multiple top level objects in one file (which JSON can't do (not counting 3rd party modifications))

That's just different syntax for a top-level list of objects.