Digital Product Passport
Please note that this content is under development and is not ready for implementation. This status message will be updated as content development progresses.
Artifacts
Are maintained at https://test.uncefact.org/vocabulary/untp/dpp/0/about
Stable Releases For Implementation
Version 1.0 stable release for production implementation is due in June 2025 after formal public review
Release for Pilot Testing
Version 0.6.0 release artifacts can be used for pilot testing.
Latest Development Version
Latest development versions are used to reflect lessons learned from pilots but should not be used for either pilot testing or production purposes.
Ontology
The ontology for the Digital Product Passport is available in JSON-LD format and can be retrieved via content negotiation from:
https://test.uncefact.org/vocabulary/untp/dpp/0/
Example:
curl https://test.uncefact.org/vocabulary/untp/dpp/0/ -H 'Accept: application/ld+json'
Version History
History of releases is available from the Version history page.
Default Render Template
A UNTP digital product passport may be rendered in any format desired by the issuer. However a default Template Design is provided here and includes mapping of visual rendering elements to the Logical Data Model.
Sample Credential
URL | QR | Description |
---|---|---|
Sample Digital Battery Passport | A sample digital product passport as a JWT envelope signed Verifiable Credential. The URL (or QR scan) resolved to a hosted verifier that displays a human readable version. Raw JSON data can be viewed via the JSON tab and the full credential can be downloaded via the download button. |
Overview
The digital product passport (DPP) is issued by the shipper of goods and is the carrier of product and sustainability information for every serialised product item (or product batch) that is shipped between actors in the value chain. It is deliberately simple and lightweight and is designed to carry the minimum necessary data at the granularity needed by the receiver of goods - such as the scope 3 emissions in a product shipment. The passport contains links to conformity credentials which add trust to the ESG claims in the passport. The passport also contains links to traceability events which provide the "glue" to follow the linked-data trail (subject to confidentiality constraints) from finished product back to raw materials. The UNTP DPP does not conflict with national regulations such as the EU DPP. In fact, it can usefully be conceptualised as the upstream B2B feedstock that provides the data and evidence needed for the issuing of high quality national level product passports.
Conceptual Model
Requirements
The digital product passport is designed to meet the following detailed requirements as well as the more general UNTP Requirements.
ID | Name | Requirement Statement | Solution Mapping |
---|---|---|---|
DPP-01 | Granularity | The DPP should support use at either model level or at batch level or at serialised item level. | Claims are made at the passport level, which MUST have a related model and MAY have a related batch and item |
DPP-02 | Classification | The DPP should support any number of product classifications using codes from a defined classification scheme (eg UN-CPC) | The productCategory property |
DPP-03 | Materials provenance | The DPP should provide a simple structure to allow issuers to break down the material composition of their products by mass fraction and origin country so that raw material provenance requirements are easily assessed and met. | The DPP "materialsProvenance" structure is designed to meet this need. |
DPP-04 | Produced at | The DPP should provide a simple structure to describe the manufacturing facility at which the product was made. The facility identifier SHOULD be resolvable and verifiable and SHOULD link to cadastral boundary information. | The "Facility" structure including the location class is designed to meet this need |
DPP-05 | Dimensions | The DPP must support the definition of key product dimensions such as length, width, height, weight, volume so that conformity claims made at the unit level (eg Co2 intensity in Kg/Kg) can be used to calculate actual values for the shipped product | Dimensions class |
DPP-06 | Traceability | The DPP should provide a means to follow links to further DPPs and conformity credentials of constituent products so that (subject to confidentiality constraints), provenance claims can be verified to any arbitrary depth up to primary production | The links to ISO/IEC 19987 (EPCIS)-based traceability event credentials from the TraceabilityPerformance class is designed to meet this need |
DPP-07 | Characteristics | The DPP should allow an issuer to provide descriptive information about the product (image, description, etc) that is extensible to meet industry specific needs. | Characteristics property as an industry extension point |
DPP-08 | Verifiable Party | The DPP should provide DPP issuer, product manufacturer, and facility operator identification including a name, a resolvable and verifiable identifier, and proof of ownership of the identifier | DigitalProductPassport.Issuer Product.ProducedByParty, Product.ProducedAtFacility - all are uniquely identified objects and SHOULD have related resolvable Identity Resolver credentials |
DPP-09 | Claims | The DPP MUST provide a means to include any number of conformity claims within one DPP so that it can provide simple single point to aggregate all claims about the product in one place | The "conformityClaims" array is designed to meet this need |
DPP-10 | Conformity Topic | The DPP MUST provide a simple mechanism to express the sustainability/circularity/conformity topic for each claim so that similar claims can be grouped and the high level scope easily understood. | The ConformityTopic code list is designed to meet this need |
DPP-11 | Metrics | The DPP MUST provide a simple mechanism to quantify a conformity claim (eg carbon intensity, water consumption, etc) and to express any accuracy range and also to compare the claimed value to a relevant benchmark such as a standard/regulation requirement or an industry average | The "Metric" class is designed to meet this need |
DPP-12 | Criteria | The DPP MUST provide a means to reference a standard or regulation as well as the specific criteria within that standard or regulation - so that claims can be understood in terms of the criteria against which they are made. | Claim.referenceRegulation, Claim.referenceStandard, Claim.assessmentCriteria |
DPP-13 | Evidence | The DPP MUST provide a means to reference independent conformity assessments that support and verify the claims being made. The related evidence SHOULD be digitally verifiable but MAY be a simple document or web page. The confidence level attached to the evidence should be clear. | The Claim.conformityEvidence property references a relevant digital conformity credential |
Logical Model
The Digital Product Passport is an assembly of re-usable components from the UNTP core vocabulary.
Core Vocabulary Documentation
The UNTP core types vocabulary defines the uniquely identified Linked Data entities such as Product, Location, Facility, Party, Standard, Regulation, Criteria, Declaration, Attestation, Endorsement. These entities provide the building blocks for construction of Digital Product Passports and Digital Conformity Credentials.
DPP Documentation
The DPP documentation provides a technology-neutral definition of classes, properties and code lists in the DPP model.
Implementation Guidance
This section provides sample JSON-LD snippets for each DPP component.
Verifiable Credential
All DPPs are issued as W3C Verifiable Credentials and MUST conform to the VCDM 2.0. Also note that all identified objects (i.e. those with an "id" property) also have a "type" property that indicates the Linked Data type of the object. The "type" values must be defined in the associated JSON-LD @context file. Key points to note from the VC sample below are:
- That the credential type is both a W3C "VerifiableCredential" and a UNTP "DigitalProductPassport". The DPP is an extension of the VCDM.
- That the "@context" reference similarly lists both the W3C VCDM context URL and the UNTP DPP context URL.
- The "id" is any globally unique reference for this specific DPP credential - typically a domain/UUID pattern.
- The issuer property, unlike most VC examples, is an object with multiple properties.
- The object conforms to the UNTP "CredentialIssuer" type.
- The id SHOULD be a DID and, if it is a DID then it MUST be a did:web.
- The name property provides a human readable name of the issuer.
- The array of "issuerAlsoKnownAs" is used to provide references to authoritative business identifiers for the issuer. In the example shown the issuer is also identified as an Australian Business with an ABN and link to the authoritative business register entry.
- The validFrom and validUntil fields are as defined in the W3C VCDM. They are optional but UNTP DPPs SHOULD include a validFrom date representing the date that the DPP was issued.
- The credential subject carries the bulk of the digital product passport information.
{
"type": [
"DigitalProductPassport",
"VerifiableCredential"
],
"@context": [
"https://www.w3.org/ns/credentials/v2",
"https://test.uncefact.org/vocabulary/untp/dpp/0.6.0/"
],
"id": "https://example-company.com/credentials/2a423366-a0d6-4855-ba65-2e0c926d09b0",
"issuer": {
"type": [
"CredentialIssuer"
],
"id": "did:web:identifiers.example-company.com:12345",
"name": "Example Company Pty Ltd",
"issuerAlsoKnownAs": [
{
"id": "https://business.gov.au/ABN/View?abn=1234567890",
"name": "Sample Company Pty Ltd",
"registeredId": "1234567890",
"idScheme": {
"type": [
"IdentifierScheme"
],
"id": "https://business.gov.au/ABN/",
"name": "Australian Business Number"
}
}
]
},
"validFrom": "2025-06-15T12:00:00Z",
"validUntil": "2035-03-15T12:00:00Z",
"credentialSubject": {
"type": [
"ProductPassport"
],
"id": "https://example.com/id/9520123456788",
... remainder of product passport information goes here ...
}
}
Product Passport
The ProductPassport
object is the subject of the verifiable credential in the UNTP Digital Product Passport (DPP). It encapsulates detailed information about a specific product, including its identification details, manufacturer, and various claims such as sustainability, circularity, and traceability. Key points to note about the ProductPassport
object are:
- The
credentialSubject
is of typeProductPassport
, which includes aproduct
attribute that contains the core product information (see the Product section below). granularityLevel
indicates whether the DPP is issued at the product class level (e.g., all shoes of the same model), batch level, or serialised item level.dueDiligenceDeclaration
is a link to a due diligence declaration that meets the legal requirements of the importing economy.materialsProvenance
is an array of UNTPMaterial
types that define the origin and characteristics of constituent materials in the product.conformityClaims
is an array ofClaim
types that list the product quality or sustainability claims made by the manufacturer against criteria defined by a reference standard or regulation. The sustainability vocabulary accommodates diverse conformity criteria expressed by various standards and regulations.circularityScorecard
is a simple object that defines the overall percentage of recycled content (and recyclable content) as well as links to recycling and repair information.emissionsScorecard
defines the carbon footprint of the product against a defined reporting standard, the scope 3 boundaries, and the extent to which the data is accurately measured.traceabilityInformation
is an array ofLink
objects that reference UNTP Digital Traceability Events, providing traceability through the value chain via events such as theTransformationEvent
that lists input and output product identifiers for a manufacturing process.
"credentialSubject": {
"type": ["ProductPassport"],
"id": "example:product/1234",
"product": {
// See Product section below for details
},
"granularityLevel": "batch",
"dueDiligenceDeclaration": {},
"materialsProvenance": [],
"conformityClaim": [],
"circularityScorecard": {},
"emissionsScorecard": {},
"traceabilityInformation": []
}
Product
The Product
object is a core component of the ProductPassport
, encapsulated within the product
attribute of the credentialSubject
. It defines detailed information about the specific product, including its identification, physical characteristics, and production details. Key points to note about the Product
object are:
- The product identification comprises four properties that identify both the specific product and the identifier scheme, as defined by the UNTP
Product
type:id
(a resolvable URI),registeredId
(alphanumeric identifier),idScheme
(the identifier scheme), and optionallyserialNumber
orbatchNumber
. The expectation is that the productid
in the DPP will match the information printed on the physical product or its container (for bulk goods) and that the identifier is a resolvable and verifiable ID. Scanning a physical product QR code (or resolving its 1D barcode) should return a link type that points to the DPP described by the specification. - DPPs may be issued at the product class level (e.g., all shoes of the same model) or at the individual item level (e.g., a specific serialised pair of shoes).
serialNumber
and/orbatchNumber
MUST be provided if the DPP is issued at the item level. - The
productImage
is an instance of the UNTPLink
object that provideslinkURL
,linkName
, andlinkType
for metadata. productCategory
is an array of UNTPClassification
objects that classify the product using a global scheme such as UN CPC. Industry-specific classification schemes (e.g., cattle breed) may also be used.furtherInformation
is an array of UNTPLink
types that optionally provide links to additional information, such as material safety data sheets. ThelinkType
values should match those returned by an Identity Resolver service for the same product ID.producedByParty
is a UNTPEntity
type that identifies the producer or manufacturer of the product, requiringid
andname
.producedAtFacility
is a UNTPEntity
type that identifies the manufacturing site, farm, or mine where the product was produced, requiringid
andname
.- The
dimensions
object defines thelength
,width
,height
,weight
, andvolume
of the product. Implementers should choose the relevant dimensions to include for the product. - The
productionDate
is relevant for batch or serialised items and indicates the date the specific batch or item was produced. - The
countryOfProduction
property must carry the ISO-3166 two-letter country code for the country where the product was manufactured. This represents only the country of manufacture for the identified product; the provenance of materials used is defined separately. - The
characteristics
property provides an extension point for commodity-specific properties, such as battery capacity in AmpHours or nutritional information for food products. UNTP does not define values for this property but provides guidance for industry extensions.
"product": {
"type": ["Product"],
"id": "https://example.com/id/9520123456788",
"name": "Baked beans, tinned, 500g.",
"registeredId": "9520123456788",
"idScheme": {},
"serialNumber": "12345",
"batchNumber": "6789",
"productImage": {},
"description": "Big and tender Great Northern Beans in tasty tomato sauce. These beans are rich in fiber and low in fat. Fiber rich food helps to maintain a healthier digestive system & reduces cholesterol.",
"productCategory": [],
"furtherInformation": [],
"producedByParty": {},
"producedAtFacility": {},
"dimensions": {},
"productionDate": "2025-04-25",
"countryOfProduction": "AU",
"characteristics": {}
}
Dimensions
The Dimension
object specifies the physical measurements of a product, including length
, width
, height
, weight
, and volume
, each represented as a decimal value paired with a unit of measure. Units MUST be drawn from UNECE Recommendation 20 Units of Measure.
"dimensions": {
"length": { "value": 0.87, "unit": "MTR" },
"width": { "value": 0.5, "unit": "MTR" },
"height": { "value": 0.3, "unit": "MTR" },
"weight": { "value": 8, "unit": "KGM" },
"volume": { "value": 7.5, "unit": "LTR" }
}
Due Diligence Declaration
The dueDiligenceDeclaration
property is a Link
object that provides a URL to a due diligence declaration document, ensuring compliance with the regulations of the market into which the product is sold. Key properties of the dueDiligenceDeclaration
include:
- The
linkURL
as a URI pointing to the due diligence declaration document. - The
linkName
as a human-readable name describing the document. - The
linkType
as a URI from a controlled vocabulary, indicating the type of link.
The dueDiligenceDeclaration
SHOULD reference a document that meets the legal requirements of the importing economy.
"dueDiligenceDeclaration": {
"type": ["Link"],
"linkURL": "https://example.com/due-diligence/123456789.pdf",
"linkName": "Due Diligence Declaration for Baked Beans",
"linkType": "https://test.uncefact.org/vocabulary/linkTypes/dcc"
}
Materials Provenance
The materialsProvenance
property is an array of Material
objects that describe the constituent materials in a product, detailing their key properties. Each Material
object includes:
- A human-readable
name
for the material (e.g., "Egyptian Cotton"). - The
originCountry
as a two-letter ISO-3166 country code (e.g., "EG"). - The
materialType
as a UNTPClassification
object, specifying the material’s classification. The classification scheme depends on the product’s commodity type, but typically includes the material’s CAS number and a URI linking to a registry entry (e.g.,https://chem.echa.europa.eu/100.028.325
), unless otherwise specified. - The
massFraction
as a decimal value representing the proportion of the product’s total mass contributed by this material (e.g., 0.5 for 50%). - The
mass
as aMeasure
object, specifying the absolute mass of the material with a value and unit from UNECE Recommendation 20 Units of Measure. - The
recycledMassFraction
as a decimal value indicating the proportion of this material derived from recycled sources (e.g., 0.5 for 50%). - The
hazardous
boolean flag indicating whether the material is hazardous. - The
materialSafetyInformation
as aLink
object, required ifhazardous
istrue
, providing a URL to safety information (e.g., a material safety data sheet). - The
symbol
as a base64-encoded binary string representing a visual symbol for the material, if applicable.
"materialsProvenance": [
{
"type": ["Material"],
"name": "Egyptian Cotton",
"originCountry": "EG",
"materialType": {
"type": ["Classification"],
"id": "https://unstats.un.org/unsd/classifications/Econ/cpc/26160",
"code": "26160",
"name": "Cotton, carded or combed",
"schemeID": "https://unstats.un.org/unsd/classifications/Econ/cpc/",
"schemeName": "UN Central Product Classification (CPC)"
},
"massFraction": 0.5,
"mass": {
"value": 10,
"unit": "KGM"
},
"recycledMassFraction": 0.5,
"hazardous": false,
"materialSafetyInformation": {},
"symbol": "RGVtb1N5bWJvbA=="
}
]
Emissions Scorecard
The emissionsScorecard
provides a high-level summary of the product’s greenhouse gas (GHG) emissions performance, expressed as a carbon footprint. Detailed emissions data, measured against specific standards or criteria, should be included in the conformityClaim
structure. Key properties of the emissionsScorecard
include:
- The
carbonFootprint
as a numeric value representing the GHG emissions intensity of CO₂ equivalent (CO₂e) per declared unit. - The
declaredUnit
as a code from UNECE Recommendation 20 Units of Measure, typicallyKGM
(kilograms), defining the product unit for the carbon footprint calculation. - The
operationalScope
indicating the scope 3 emissions boundary, which should beCradleToGate
for DPPs (excluding post-sale emissions) orCradleToGrave
for full lifecycle emissions. - The
primarySourcedRatio
as a decimal value (0 to 1) representing the proportion of emissions data sourced directly from suppliers or product-specific measurements, rather than estimated from industry averages. - The
reportingStandard
as aStandard
object identifying the standard used for emissions assessment (e.g., GHG Protocol, WBSCD Pathfinder Framework), including its identifier, name, issuing party, and issue date.
"emissionsScorecard": {
"type": ["EmissionsPerformance"],
"carbonFootprint": 1.5,
"declaredUnit": "KGM",
"operationalScope": "CradleToGate",
"primarySourcedRatio": 0.3,
"reportingStandard": {
"type": ["Standard"],
"id": "https://www.wbcsd.org/resources/pathfinder-framework-version-2-0/",
"name": "WBSCD Pathfinder Framework - V.2.0",
"issuingParty": {
"id": "https://www.wbcsd.org/",
"name": "World Business Council for Sustainable Development"
},
"issueDate": "2023-12-01"
}
}
Circularity Scorecard
The circularityScorecard
provides a concise summary of the product’s circularity performance, highlighting its recyclability, recycled content, and durability. Detailed circularity data and evidence should be included in one or more Claim
objects within the conformityClaim
structure. Key properties of the circularityScorecard
include:
- The
recyclingInformation
as aLink
object providing a URL to recycling instructions, primarily for recycling centers. - The
repairInformation
as aLink
object providing a URL to repair instructions, targeted at end users or repair service centers. - The
recyclableContent
as a decimal value (0 to 1) indicating the proportion of the product’s mass designed to be recyclable or reusable. - The
recycledContent
as a decimal value (0 to 1) indicating the proportion of the product’s mass made from recycled or repurposed materials. - The
utilityFactor
as a numeric value representing the product’s durability relative to the industry average, calculated as the product’s lifetime (e.g., usage cycles) divided by the industry average (e.g., 1.2 indicates 20% greater durability). - The
materialCircularityIndicator
as a decimal value (0 to 1) providing an overall circularity score, calculated as1 - (V + W) / (2 * D)
, whereV
is the virgin material proportion (1 -recycledContent
),W
is the waste leakage proportion (1 -recyclableContent
), andD
is theutilityFactor
. See the Material Circularity Indicator (MCI) reference for details.
"circularityScorecard": {
"type": ["CircularityPerformance"],
"recyclingInformation": {
"type": ["Link"],
"linkURL": "https://example.com/products/123456789/recycling.pdf",
"linkName": "Recycling Instructions",
"linkType": "https://idr.untp.showthething.com/api/1.0.0/voc/sustainabilityInfo"
},
"repairInformation": {
"type": ["Link"],
"linkURL": "https://example.com/products/123456789/repair.pdf",
"linkName": "Repair Instructions",
"linkType": "https://idr.untp.showthething.com/api/1.0.0/voc/sustainabilityInfo"
},
"recyclableContent": 0.5,
"recycledContent": 0.3,
"utilityFactor": 1.2,
"materialCircularityIndicator": 0.67
}
Traceability Information
The traceabilityInformation
property is an array of TraceabilityPerformance
objects, each representing traceability data for a specific value chain process. These objects group traceability information by production or supply chain steps, indicating the extent of verifiable tracing for materials and components. Key properties of each TraceabilityPerformance
object include:
- The
valueChainProcess
as a human-readable string describing the specific value chain step (e.g., "Canning"). - The
verifiedRatio
as a decimal value (0 to 1) indicating the proportion of materials or components in this step that have been verifiably traced using digital traceability events. - The
traceabilityEvent
as an array ofSecureLink
objects, each providing a URL to a UNTP Digital Traceability Event (DTE) structure, along with metadata such as link name, type, hash digest, hash method, and encryption method (if applicable). These links reference events like transformations or shipments, as defined in Digital Traceability Events.
Each value chain step SHOULD specify the verifiedRatio
to reflect the traceability coverage, and MAY include traceabilityEvent
links to provide evidence of traceability.
"traceabilityInformation": [
{
"type": ["TraceabilityPerformance"],
"valueChainProcess": "Canning",
"verifiedRatio": 0.5,
"traceabilityEvent": [
{
"type": ["SecureLink", "Link"],
"linkURL": "https://example.com/events/123456789.json",
"linkName": "Canning Process Event",
"linkType": "https://test.uncefact.org/vocabulary/linkTypes/dte",
"hashDigest": "50af99a26f4af48c9f4ad8cf9d2f5018780ab4bb1167f0e94884ec228f1ba832",
"hashMethod": "SHA-256",
"encryptionMethod": "AES"
}
]
}
]
Conformity Information
A key idea in UNTP is that performance claims made in product passports and facility records SHOULD reference well defined criteria from a recognised scheme, standard, or regulation. Also that performance assessments made in conformity credentials MUST also reference well defined criteria. In this way, claims and assessments have unambiguous meaning as defined by the relevant scheme, standard or regulation. The conformityClaim
structure of a DPP is described below.
- The
id
as a globally unique identifier, either a UUID or a URI within the DPP issuer’s domain. - The
description
as a human-readable explanation of the claim’s purpose or scope (e.g., summarizing the emissions assessment for battery production). - The
referenceStandard
as a UNTPStandard
object identifying the standard against which the claim is made. - The
referenceRegulation
as a UNTPRegulation
object identifying the regulation against which the claim is made. Typically, a claim references either aStandard
or aRegulation
, but both may apply in some cases. - The
assessmentCriteria
as an array of UNTPCriterion
objects specifying the rules within the standard or regulation against which the claim is evaluated. - The
declaredValue
as an array of UNTPMetric
objects defining the product’s actual measured values, optionally including accuracy. If sensitive, this may be replaced by aconformance
assertion. - The
conformance
as a boolean indicating whether the product meets the specified criteria. - The
conformityTopic
as a code from a UNTP classification scheme, categorizing the claim (e.g., environmental sustainability). - The
assessmentDate
as a date when the claim was assessed. - The
conformityEvidence
as aSecureLink
object providing a URL to a second or third party attestation, such as a UNTP Digital Conformity Credential, PDF, or other evidence format.
"conformityClaim": [
{
"type": ["Claim", "Declaration"],
"id": "https://example.com/declarations/90664869327",
"description": "Declaration of greenhouse gas emissions intensity for battery production, conforming to the GBA Rulebook V.2.0.",
"referenceStandard": {
"type": ["Standard"],
"id": "https://www.globalbattery.org/media/publications/gba-rulebook-v2.0-master.pdf",
"name": "GBA Battery Passport Greenhouse Gas Rulebook - V.2.0",
"issuingParty": {
"id": "https://www.globalbattery.org/",
"name": "Global Battery Alliance"
},
"issueDate": "2023-12-01"
},
"assessmentCriteria": [
{
"type": ["Criterion"],
"id": "https://www.globalbattery.org/GHGRulebook/2.0/GHG_Calculation",
"name": "GHG Calculation",
"description": "Calculation of greenhouse gas emissions for product packaging process",
"conformityTopic": "environment.emissions",
"status": "active"
}
],
"declaredValue": [
{
"type": ["Metric"],
"metricName": "GHG Emissions Intensity",
"metricValue": {
"type": ["Measure"],
"value": 1.5,
"unit": "KGM"
},
"accuracy": 0.05
}
],
"conformance": true,
"conformityTopic": "environment.emissions",
"assessmentDate": "2024-03-15",
"conformityEvidence": {
"type": ["SecureLink", "Link"],
"linkURL": "https://example.com/certificates/1234567.json",
"linkName": "GBA Rulebook Conformity Certificate",
"linkType": "https://test.uncefact.org/vocabulary/linkTypes/dcc",
"hashDigest": "6239119dda5bd4c8a6ffb832fe16feaa5c27b7dba154d24c53d4470a2c69adc2",
"hashMethod": "SHA-256",
"encryptionMethod": "none"
}
}
]
Referencing Conformity Criterion
Conformity claims in DPPs SHOULD unambiguously reference a criterion in a relevant scheme, standard, or regulation using a URI. For example the"id": "https://www.globalbattery.org/GHGRulebook/2.0/GHG_Calculation"
property in the example above is an example of a URI that references which rulebook an emissions intensity claim is made. Issuers of Digital product Passports (and Facility Records and Conformity Credentials) therefore need a way to find the the right criterion URI to put in their claims and assessments. This is the purpose of the UNTP Sustainability Vocabulary Catalog.