custom.json

{
    "validation": {
        "metadata": {
            "_selector": "metadata.properties",
            "properties": [
                {
                    "name": "urn:example.com:disclaimer",
                    "value": "This SBOM is current as of the date it was generated and is subject to change\\.",
                    "_validate_description": "matches fixed value",
                    "_validate_key": "name",
                    "_validate_unique": "name"
                },
                {
                    "name": "urn:example.com:classification",
                    "value": "This SBOM is Confidential Information. Do not distribute\\.",
                    "_validate_description": "matches fixed value",
                    "_validate_key": "name",
                    "_validate_unique": "name"
                }
            ]
        }
    }
}