---
title: "graph.link@1 · OpenVibe.Services"
canonical: "https://openvibe.services/docs/contracts/graph.link"
updated: null
---

# graph.link@1 · OpenVibe.Services

HTML: [graph.link@1 · OpenVibe.Services](https://openvibe.services/docs/contracts/graph.link)

# GraphLink `graph.link@1`

Generated at 2026-11-13 06:25:48 UTC from [`openvibe-contracts v0.419.0`](https://github.com/OpenVibers/OpenVibe.Contracts/tree/v0.419.0) and [`openvibe-sdk v0.161.0`](https://github.com/OpenVibers/OpenVibe.SDK/tree/v0.161.0).

- Version: 1.0.0
- Owner: graph
- Visibility: public
- Status: active
- Compatibility: backward
- Schema: [`https://openvibe.network/contracts/graph/link.v1.json`](/docs/contracts/graph.link.json)

graph.link@1: a directed, typed relation between canonical OpenVibe object names (plan 2026-10-28 section 4.1). The owning service supplies the OVRNs and relation; no graph producer is live yet.

## Fields

| Field | Type | Required | Description | Constraints |
| --- | --- | --- | --- | --- |
| `from` | string | yes |  | - `pattern ^ovrn:[a-z][a-z0-9-]*:.+$`<br>- `maxLength 512` |
| `rel` | string | yes | Typed relation, for example derivedFrom, on, soldBy or cites. | - `pattern ^[a-z][A-Za-z0-9]{0,63}$` |
| `to` | string | yes |  | - `pattern ^ovrn:[a-z][a-z0-9-]*:.+$`<br>- `maxLength 512` |

## Examples

From the contract's own test fixtures: valid ones validate, rejected ones must fail.

 Valid: derived-from

~~~~
{
  "from": "ovrn:meme:prj_01J0000000000000000000000A:meme/mem_01K0000000000000000000000B",
  "rel": "derivedFrom",
  "to": "ovrn:video:prj_01J0000000000000000000000A:clip/clp_01K0000000000000000000000C"
}
~~~~

Rejected: missing-target

~~~~
{
  "from": "ovrn:meme:prj_01J0000000000000000000000A:meme/mem_01K0000000000000000000000B",
  "rel": "derivedFrom"
}
~~~~

## Validate

~~~~
const contracts = require('openvibe-contracts');
contracts.validate('graph.link@1', value);   // { valid, errors: [{ path, message }] }
~~~~