YAML 구문 참조

Plain unquoted string — most common

Single-quoted: no variable or escape processing

Double-quoted: supports escape sequences (\n, \t, etc.)

Whole number (base 10)

Floating point number

Boolean value — use only true/false (YAML 1.2)

Null / absence of value

ISO 8601 date format

Single-line comment. No multi-line comment syntax.

Force value to be treated as a specific type

Key-value pairs — indented block style

Inline map — equivalent to block style

List of items — block style with dash+space

Inline list — equivalent to block style

List where each item is a map

Arbitrarily deep nesting

Merge the keys of a referenced mapping into current map

Preserves newlines exactly as written

Newlines folded into spaces (great for long descriptions)

Literal block, strip all trailing newlines

Literal block, keep all trailing newlines

Folded block, strip trailing newlines

Assigns an anchor (label) to the current node

References (copies) an anchored node

Anchor a scalar value to reuse it

Anchor a list

Explicitly declare YAML version (optional, rarely needed)

Marks the start of a YAML document. Required if using directives.

Marks the end of a YAML document. Optional but useful.

Multiple YAML docs in one file (stream)

Base64-encoded binary data

Indentation MUST use spaces only — never tabs

Values containing ': ' (colon+space) must be quoted

1.0 parses as float! Quote or tag it to keep as string

YAML 1.1 parses yes/no/on/off as booleans — quote to use strings

Trailing spaces in keys are included in the key string

Duplicate keys — behavior is parser-specific (usually last wins). Treat as error.