> xCDN_ (Rust)

A complete Rust library to parse, serialize and deserialize > xCDN_ — eXtensible Cognitive Data Notation.

What is > xCDN_?

xCDN_is a human-first, machine-optimized data notation with native types, tags and annotations. It supports comments, trailing commas, unquoted keys and multi‑line strings. You can read more about this notation in the > xCDN_ repository.

Features

• Full streaming document model (one or more top-level values)
• Optional prolog ($schema: "...", …)
• Objects, arrays and scalars
• Native types: Decimal (d"..."), UUID (u"..."), DateTime (t"..." RFC3339), Duration (r"..." ISO8601), Bytes (b"..." Base64)
• #tags and @annotations(args?) that decorate any value
• Comments: // and /* ... */
• Trailing commas and unquoted keys
• Pretty or compact serialization
• Optional serde bridge for Value

Example

$schema: "https://gslf.github.io/xCDN/schemas/v1/meta.xcdn",

server_config: {
  host: "localhost",
  // Unquoted keys & trailing commas? Yes.
  ports: [8080, 9090,],

  // Native Decimals & ISO8601 Duration
  timeout: r"PT30S",
  max_cost: d"19.99",

  // Semantic Tagging
  admin: #user {
    id: u"550e8400-e29b-41d4-a716-446655440000",
    role: "superuser"
  },

  // Binary data handling
  icon: @mime("image/png") b"iVBORw0KGgoAAAANSUhEUgAAAAUA...",
}

Usage

use xcdn::{parse_str, ser::to_string_pretty};

let doc = parse_str(include_str!("../tests/data/sample.xcdn")).unwrap();
let text = to_string_pretty(&doc).unwrap();
println!("{}", text);

License

MIT, see LICENSE.

This is a :/# GSLF project.