1%YAML 1.1
2---
3!!str "Root flow scalar"
4%YAML 1.1
5---
6!!str "Root block scalar\n"
7%YAML 1.1
8---
9!!map {
10  ? !!str "foo"
11  : !!str "bar"
12}
13---
14#!!str ""
15!!null ""
16