YAML is the default legacy choice because of Jekyll and its Ruby heritage. It makes sense to start with it to have more compatibility out of the gate but there are a lot of interesting and maybe better (to at least some people) formats out there that could be used as well as they are terse, human readable (so thanks no XML), have a resilient syntax (which makes JSON too easy to break)
jmatsushita
commented
8 years ago
This was brought up in https://github.com/iilab/contentascode/issues/25#issuecomment-194020581
YAML is the default legacy choice because of Jekyll and its Ruby heritage. It makes sense to start with it to have more compatibility out of the gate but there are a lot of interesting and maybe better (to at least some people) formats out there that could be used as well as they are terse, human readable (so thanks no XML), have a resilient syntax (which makes JSON too easy to break)