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The EPD & MKI module handles the ingestion, parsing, and visualization of Environmental Product Declarations (EPDs) and their associated MKI (Milieukostenindicator) scores.

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What are EPD and MKI?

  • EPD (Environmental Product Declaration): A standardized document that quantifies the environmental impact of a product across its lifecycle, following ISO 14025 and EN 15804.
  • MKI (Milieukostenindicator): A Dutch environmental cost indicator that translates environmental impacts into a single monetary value (EUR), widely used in construction and infrastructure.

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Ingesting an EPD

Upload an EPD document (PDF or XML) for automatic parsing: 
mutation {
  ingestEpd(input: {
    productId: "prod_abc123"
    source: URL
    sourceUrl: "https://example.com/epd/product-abc.xml"
    format: EN15804_XML
  }) {
    id
    status
    productId
    parsedData {
      declarationNumber
      validFrom
      validTo
      functionalUnit
      impactCategories {
        name
        code
        value
        unit
        phase
      }
      mkiScore
    }
  }
}

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Supported input formats

FormatDescription
EN15804_XMLEN 15804 compliant XML format
ILCD_XMLILCD/EPD format
PDFPDF document (OCR-parsed)
MANUALManual data entry via API fields

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Querying EPD data

query {
  epd(productId: "prod_abc123") {
    declarationNumber
    programOperator
    validFrom
    validTo
    functionalUnit
    impactCategories {
      name
      code
      value
      unit
      phase
    }
    mkiScore
    mkiBreakdown {
      category
      value
      percentage
    }
  }
}

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MKI calculation

Calculate MKI scores with custom parameters, similar to Insert Marktplaats: 
mutation {
  calculateMki(input: {
    productId: "prod_abc123"
    quantity: 1
    functionalUnit: "m2"
    lifespan: 75
    maintenanceScenario: STANDARD
  }) {
    mkiScore
    unit
    perFunctionalUnit
    breakdown {
      phase
      value
      percentage
    }
    phases {
      A1_A3 { value description }
      A4 { value description }
      A5 { value description }
      B1_B7 { value description }
      C1_C4 { value description }
      D { value description }
    }
  }
}
Response: 
{
  "data": {
    "calculateMki": {
      "mkiScore": 0.87,
      "unit": "EUR/m2",
      "perFunctionalUnit": 0.87,
      "breakdown": [
        { "phase": "Production (A1-A3)", "value": 0.45, "percentage": 51.7 },
        { "phase": "Transport (A4)", "value": 0.08, "percentage": 9.2 },
        { "phase": "Construction (A5)", "value": 0.05, "percentage": 5.7 },
        { "phase": "Use (B1-B7)", "value": 0.15, "percentage": 17.2 },
        { "phase": "End of life (C1-C4)", "value": 0.18, "percentage": 20.7 },
        { "phase": "Benefits (D)", "value": -0.04, "percentage": -4.6 }
      ]
    }
  }
}

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EPD lifecycle phases

PhaseCodeDescription
ProductionA1-A3Raw material supply, transport, manufacturing
TransportA4Transport to construction site
ConstructionA5Installation process
UseB1-B7Use, maintenance, repair, replacement
End of lifeC1-C4Demolition, transport, waste processing, disposal
BenefitsDRecycling and reuse benefits beyond system boundary

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Webhook events

  • epd.ingested — EPD document successfully parsed
  • epd.validation_failed — EPD parsing encountered errors
  • mki.calculated — MKI score computed for a product