MAML

{
  project: "MAML"
  tags: [
    "minimal"
    "readable"
  ]

  # A simple nested object
  spec: {
    version: 1
    author: "Anton Medvedev"
  }

  # Array of objects
  examples: [
    {
      name: "JSON", born: 2001
    }
    {
      name: "MAML", born: 2025
    }
  ]

  notes: """
This is a multiline raw strings.
Keeps formatting as-is.
"""
}

Rationale ​

JSON is the most popular data-interchange format. But it isn't a very good configuration language.

MAML keeps JSON’s simplicity and adds only the needed bits for a good configuration language:

1. Comments
2. Multiline raw strings
3. Optional commas
4. Optional key quotes
5. Ordered key-value objects

MAML is human-readable and easy to parse.

FAQ ​

1. What’s the difference between MAML and JSONC/JSON5?
2. Why not Zig-style multiline?
3. What about YAML?

Editor Support ​

• IntelliJ IDEA
  maml-intellij-plugin (source) MAML v0.1

Implementations ​

MAML is a brand-new language, so feel free to create new implementations following the specification.

• JavaScript
  maml.js MAML v0.1

• Python
  maml-py MAML v0.1

• C
  libmaml MAML v0.1

• Java
  maml-java MAML v0.1

• Rust
  maml-rs [work in progress]

• PHP
  maml-php [work in progress]

• Grammar
  maml-grammar MAML v0.1 for TextMate, VitePress, Shiki, Linguist

Projects Using MAML ​

• google/zx – A tool for writing better scripts
• Envi – Environment file management
• Tachi Code – Browser-native code editor
• Add your project too!