dpp-digital-link 0.5.0

GS1 Digital Link parser/builder and JSON-LD helpers for Odal Node
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# dpp-digital-link

[![crates.io](https://img.shields.io/crates/v/dpp-digital-link.svg)](https://crates.io/crates/dpp-digital-link)
[![docs.rs](https://img.shields.io/docsrs/dpp-digital-link)](https://docs.rs/dpp-digital-link)
[![License: Apache-2.0](https://img.shields.io/badge/License-Apache--2.0-blue.svg)](../../LICENSE)

GS1 Digital Link URL parsing, link-type content negotiation, and
[Asset Administration Shell](https://industrialdigitaltwin.org/en/content-hub/aasspecifications)
(AAS) submodel mapping for the [Odal Node](https://odal-node.io) Digital Product
Passport system.

Pure Rust, no I/O, no network calls.

## When to use this crate

- You need to parse or build GS1 Digital Link URLs (GTIN, serial, batch).
- You are resolving DPP links and need to negotiate content by link type, media type,
  or access tier.
- You want to map a DPP `serde_json::Value` to an AAS submodel for Industry 4.0
  interoperability.

## Example

```rust
use dpp_digital_link::{DigitalLink, AccessTier, negotiate, Gs1LinkType};

// Parse a GS1 Digital Link URL
let link = DigitalLink::parse(
    "https://id.gs1.org/01/09521234543213/21/ABC123",
).unwrap();
println!("GTIN: {}", link.gtin);
println!("Serial: {}", link.serial.unwrap());

// Negotiate the best link for a professional-tier consumer
let descriptors = vec![/* LinkDescriptor items */];
let best = negotiate(&descriptors, None, None, AccessTier::Professional);
```

## Relationship to other crates

| Crate | Role |
|---|---|
| `dpp-domain` | Provides `AccessTier` — required by this crate |

## Minimum Rust version

1.96 (MSRV is enforced in CI)

## License

Apache-2.0 — see [LICENSE](../../LICENSE)