Format Comparison

How MSN stacks up against JSON, YAML, TOML, and XML.

Feature	MSN	JSON	YAML	TOML	XML
Comments	yes	no	yes	yes	yes
Unlimited Nesting	yes	yes	yes	hard	yes
Token Efficient	best	poor	good	fair	worst
Compiles to JSON	yes	native	lib	lib	lib
Type Inference	yes	no	yes	yes	no
Easy to Learn	yes	yes	no	fair	no
Simple Spec	yes	yes	no	fair	no

MSN

Pros

+Fewest tokens/characters of any format
+Unlimited nesting via dash counting
+No brackets, braces, quotes, or commas needed
+Compiles directly to valid JSON
+Simple enough to parse with a few regex rules
+Comments supported

Cons

-New format — not yet widely adopted
-Tooling ecosystem still growing

Example

- server
-- host: localhost
-- port: 3000
-- features
--- * auth
--- * logging

JSON

Pros

+Universal support across languages
+Native in JavaScript/TypeScript
+Strict and unambiguous

Cons

-Very verbose — lots of quotes, braces, commas
-No comments
-No trailing commas
-Hard to read deeply nested objects

Example

{
  "server": {
    "host": "localhost",
    "port": 3000,
    "features": ["auth", "logging"]
  }
}

YAML

Pros

+Human-readable
+Widely used (Docker, K8s, CI/CD)
+Comments supported
+Rich type system

Cons

-Whitespace-sensitive — indentation errors crash parsers
-Implicit typing causes surprises (e.g. "no" → false)
-Complex spec — many edge cases
-Norway problem (NO → false)

Example

server:
  host: localhost
  port: 3000
  features:
    - auth
    - logging

TOML

Pros

+Clear and unambiguous syntax
+Popular in Rust/Go ecosystems
+Good for flat configs

Cons

-Deeply nested structures get very verbose
-Arrays of tables syntax is confusing
-Inline tables cannot span multiple lines
-Limited ecosystem outside Rust/Go

Example

[server]
host = "localhost"
port = 3000
features = ["auth", "logging"]

XML

Pros

+Very mature with rich tooling
+Supports attributes and namespaces
+Schema validation (XSD)

Cons

-Extremely verbose — opening and closing tags
-Hard to read for configuration
-Large file sizes
-Mostly replaced by JSON/YAML for configs

Example

<server>
  <host>localhost</host>
  <port>3000</port>
  <features>
    <item>auth</item>
    <item>logging</item>
  </features>
</server>