1%YAML 1.1
2---
3!!map {
4  ? !!null ""
5  : !!str "value",
6  ? !!str "explicit key"
7  : !!str "value",
8  ? !!str "simple key"
9  : !!str "value",
10  ? !!seq [
11    !!str "collection",
12    !!str "simple",
13    !!str "key"
14  ]
15  : !!str "value"
16}
17