DPP-CQ JSON Schema Reference
ICO Std 2001-2026 — Core data schema for cultural and quality product digital passports.
Based on W3C Verifiable Credentials Data Model v2.0.
Schema ID: https://icoun.org/schemas/dpp-cq/v1.0.0
Draft: JSON Schema Draft 2020-12
Required Fields
| Field |
Type |
Description |
@context |
array[uri] |
JSON-LD context. Must include W3C VC base + DPP-CQ context |
type |
array[string] |
Must include VerifiableCredential + at least one DPP-CQ type |
issuer |
string (uri) |
DID of issuing authority. Format: did:ico:issuer:<namespace> |
issuanceDate |
string (datetime) |
RFC 3339 issuance timestamp |
credentialSubject |
object |
Product and its attributes |
proof |
object |
Digital proof (signature) |
Optional Fields
| Field |
Type |
Description |
id |
string (uri) |
Unique credential ID. Recommended: did:ico:dpp:<ns>:<id> |
expirationDate |
string (datetime) |
RFC 3339 expiration (recommended for quality products) |
credentialStatus |
object |
Revocation/suspension status mechanism |
credentialSubject
Required
| Field |
Type |
Description |
id |
string (uri) |
Product DID |
productName |
object |
Multilingual product name (ISO 639-1 keys) |
category |
string (enum) |
Product category code |
Category Enum Values
geographical-indication-teaintangible-cultural-heritage-ceramichaute-couture-apparelgeographical-indication-foodhandicraftspecialty-agricultural-productcultural-creative-productother
Optional Product Fields
| Field |
Type |
Description |
qualityGrade |
string |
Quality grade per issuing authority |
productImage |
string (uri) |
IPFS CID or HTTPS URL |
origin |
object |
Geographical origin (see below) |
culturalData |
object |
Cultural heritage data (see below) |
traceability |
object |
Supply chain traceability (see below) |
qualityAttributes |
object |
Sensory and quality attributes (see below) |
authenticityMarks |
array |
Physical anti-counterfeiting features |
origin Object
| Field |
Type |
Required |
Description |
type |
string (enum) |
✅ |
GeographicalIndication / PlaceOfOrigin / ManufacturingLocation |
country |
string |
✅ |
ISO 3166-1 alpha-2 code |
giNumber |
string |
— |
Official GI registration number |
region |
string |
— |
Region or place name |
coordinates |
object |
— |
latitude + longitude |
culturalData Object
| Field |
Type |
Description |
heritageStatus |
string (enum) |
UNESCO ICH / National ICH / Provincial ICH / Traditional Craft / Culturally Significant / None |
heritageYear |
integer |
Year of inscription |
heritageNumber |
string |
Official registration number |
craftMethod |
string |
Traditional craftsmanship description |
craftHistory |
string |
Historical background |
artisanInfo |
object |
Artisan details (with consent): name, title, generation, biography |
culturalNarrative |
string |
Cultural story or significance |
traceability Object
| Field |
Type |
Description |
harvestDate |
string (date) |
Harvest/production date (ISO 8601) |
processLocation |
string |
Processing location |
batchNumber |
string |
Production batch/lot number |
supplyChainSteps |
array |
Chain of supply steps, each with step, date, location, entity, certification |
qualityAttributes Object
| Field |
Type |
Description |
appearance |
string |
Visual characteristics |
aroma |
string |
Scent profile |
taste |
string |
Flavor profile |
texture |
string |
Tactile qualities |
materialComposition |
string |
Material breakdown |
specifications |
array |
Technical specs: attribute, value, unit, testMethod |
certifications |
array |
Third-party certs: certificationBody, certificationType, certificateNumber, validUntil |
authenticityMarks Array
| Field |
Type |
Description |
type |
string (enum) |
nfc-chip / qr-code / hologram / watermark / security-thread / other |
identifier |
string |
Unique identifier for the mark |
description |
string |
Description of the feature |
proof Object
| Field |
Type |
Required |
Description |
type |
string |
✅ |
Recommended: BbsBlsSignature2020, Ed25519Signature2020, DataIntegrityProof |
created |
datetime |
✅ |
Proof creation timestamp |
proofPurpose |
string (enum) |
✅ |
assertionMethod / authentication / controllerProof |
verificationMethod |
string (uri) |
✅ |
DID key reference |
proofValue |
string |
— |
Signature value |
Full Schema
The complete JSON Schema file is available at:
📄 dpp-cq.schema.json
Schema: https://icoun.org/schemas/dpp-cq/v1.0.0
Standard: ICO Std 2001-2026
Version: 1.0.0 (Draft)
License: CC BY 4.0 (documentation) / Apache 2.0 (implementation)