{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://docforge.local/schema/edge-v1.json",
  "title": "DocForge generic edge",
  "type": "object",
  "required": ["source_id", "relation", "target_id"],
  "properties": {
    "source_id": { "type": "string", "pattern": "^[a-z0-9][a-z0-9._-]{1,127}$" },
    "relation": { "type": "string", "pattern": "^[a-z0-9][a-z0-9._-]{1,127}$" },
    "target_id": { "type": "string", "pattern": "^[a-z0-9][a-z0-9._-]{1,127}$" }
  },
  "additionalProperties": false
}