YAML Cheat Sheet

# This is a comment

string: "Hello, World"
integer: 123
float: 3.14
boolean: true

base: &default
  adapter: postgres
  host: localhost

development:
  <<: *default
  database: dev_db

name: &name Example
person:
  name: *name

key: |
  This is a
  multiline string.

key: >
  This is a
  folded string.

---
key: value
---
another_key: another_value

set:
  ? item1
  ? item2
  ? item3

ordered_map:
  key1: value1
  key2: value2

mapping_to_sequences:
  key1:
    - item1
    - item2
  key2:
    - item3
    - item4

sequence_of_mappings:
  - key1: value1
    key2: value2
  - key3: value3
    key4: value4

mapping:
  key1: value1
  key2: value2

mapping_of_mappings:
  parent1:
    child1: value1
    child2: value2
  parent2:
    child3: value3
    child4: value4