# Unordered set of key: value pairs.
Block style: !!map
  Clark : Evans
  Brian : Ingerson
  Oren  : Ben-Kiki
Flow style: !!map { Clark: Evans, Brian: Ingerson, Oren: Ben-Kiki }

# YAML has no restrictions on key type, so it can be an array
? - foo
  - bar
: baz