YAML

Type Coercion Traps

• yes, no, on, off, true, false → boolean; quote if literal string: "yes"
• NO (Norway country code) → false in YAML 1.1; always quote country codes
• 1.0 → float, 1 → int; quote version numbers: "1.0"
• 010 → octal (8) in YAML 1.1; quote or use 0o10 explicitly
• null, ~, empty value → null; quote if literal: "null", "~"
• .inf, -.inf, .nan → special floats; quote if literal strings

Indentation

• Spaces only—tabs are forbidden and cause parse errors
• Consistent indent width required within document—2 spaces conventional
• Sequence items - count as indentation—nested content aligns after the space

Strings