Explicit Keys
- Sometimes you want to have a mapping or a sequence as a mapping key
- Perl and many other languages don't support that natively, but you can do it in YAML
- Sometimes you want to break your key into multiple lines for readability
? simple explicit key
: simple value
? inner key: inner value
: outer value
? this is a
very long key broken
into several
lines
: and a short value
? some explicit key