Null and Boolean

---
A null: null
A null: ~
Also a null: # Empty
Not a null: ""
Booleans: [ true, True, false, FALSE ]

Numbers and timestamps

---
Integers: [ 0, -0, 3, 0o7, 0x3A, -19 ]
Floats: [ 0., -0.0, .5, 12e03, +12e03, -2E+05 ]
Also floats: [ .inf, -.Inf, +.INF, .NAN ]
Timestamps:
  canonical: 2001-12-15T02:59:43.1Z
  iso8601: 2001-12-14t21:59:43.10-05:00
  spaced: 2001-12-14 21:59:43.10 -5
  date: 2002-12-14
  times:
    - 10:53
    - 10:53:20.53

Strings

---
product: High Heeled "Ruby" Slippers
description: "Putting on these \"slippers\" is easy."
address:
  city:   East Centerville
  street: !!str |
    123 Tornado Alley
    Suite 16

  specialDelivery:  >
    Follow the Yellow Brick
    Road to the Emerald City.
    #Pay no attention to the
    man behind the curtain.

Sequences and maps

---
- Casablanca
- North by Northwest
- {
    name: John Smith, age: 33}
- name: Mary Smith
  age: 27
---
"name": John Smith
age: 33
men: [ John Smith,
    "Bill Jones" ]
women:
 - Mary Smith
 - "Susan Williams"

Tags

---
!!map {
  ? !!str friends: !!seq [
    !!map {
      ? !!str "age"
      : !!int 33,
      ? !!str "name"
      : !!str "John Smith",
    }
  ],
  men:
    [ !!str "John Smith", !!str "Bill Jones"]
}

Full example

%YAML 1.2
--- !<tag:clarkevans.com,2002:invoice>
invoice: 34843
date   : 2001-01-23
bill-to: &id001
  given  : Chris
  family : Dumars
  address:
    lines: |
      458 Walkman Dr.
      Suite #292
    city    : Royal Oak
    state   : MI
    postal  : 48046
ship-to:
  <<: *id001
  product:
    - sku         : BL394D
      quantity    : 4
      description : Basketball
      price       : 450.00
    - sku         : BL4438H
      quantity    : 1
      description : Super Hoop
      price       : 2392.00
tax  : 251.42
total: 4443.52
comments:
    Late afternoon is best.
    Backup contact is Nancy