//! Metadata types for Codex documents.
//!
//! This module provides types for Dublin Core metadata and extended metadata
//! as defined in the Codex specification.
//!
//! # Dublin Core
//!
//! Dublin Core is the required metadata standard for Codex documents:
//!
//! ```rust
//! use cdx_core::metadata::DublinCore;
//!
//! let dc = DublinCore::new("Annual Report 2025", "Jane Doe");
//! assert_eq!(dc.title(), "Annual Report 2025");
//! ```
pub use ;