{
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    "@vocab": "https://schema.org/",
    "chemfield": "https://chemfield.github.io/openchem/vocab#",
    "prov": "http://www.w3.org/ns/prov#",
    "dcterms": "http://purl.org/dc/terms/"
  },
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  "id": "chemfield:smartslag:composition-web:v1",
  "title": "SmartSlag BOF-slag compositie en Noord-Holland klei meetmatrix",
  "updatedAt": "2026-06-29",
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      "mapsTo": [
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        "process_variables",
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      "note": "A field/web can be resolved under multiple names; all aliases point to the same canonical composition web."
    },
    {
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      "alias": "openchem",
      "canonicalField": "chemfield:smartslag:composition",
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      "note": "A field/web can be resolved under multiple names; all aliases point to the same canonical composition web."
    },
    {
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      "alias": "webchem",
      "canonicalField": "chemfield:smartslag:composition",
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        "composition_records",
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      "note": "A field/web can be resolved under multiple names; all aliases point to the same canonical composition web."
    },
    {
      "kind": "chemfield_alias",
      "alias": "chemweb",
      "canonicalField": "chemfield:smartslag:composition",
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      "mapsTo": [
        "composition_records",
        "process_variables",
        "source_provenance",
        "origintrail_prepared_asset"
      ],
      "note": "A field/web can be resolved under multiple names; all aliases point to the same canonical composition web."
    },
    {
      "kind": "chemfield_alias",
      "alias": "chemfield",
      "canonicalField": "chemfield:smartslag:composition",
      "href": "chemfield-compositions.json",
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        "process_variables",
        "source_provenance",
        "origintrail_prepared_asset"
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      "note": "A field/web can be resolved under multiple names; all aliases point to the same canonical composition web."
    }
  ],
  "factPolicy": {
    "noInventedMeasurements": true,
    "clayChemistryRule": "Noord-Holland clay chemistry is not marked measured unless a source contains location, depth, method, and composition values.",
    "enrichmentRule": "Numeric enrichment versus Noord-Holland clay remains locked until measured clay composition records are attached.",
    "units": {
      "wt_pct_basis_points": "100 basis points = 1 wt%",
      "ppm_mg_per_kg": "parts per million by mass"
    },
    "massBalanceRule": "Noord-Holland clay mass balances are stored as 1000 kg dry-basis templates per location/depth. They are not chemical mass balances until measured oxide, trace, LOI/moisture and residual terms are attached and close to 100 wt%."
  },
  "originTrail": {
    "status": "prepared_not_published",
    "namespace": "did:dkg:knitweb",
    "publishBlocker": "No live OriginTrail DKG node credentials/config were present in the workspace during this update.",
    "localIdentityRule": "sha256 over stable JSON with cid/ual fields excluded in this static release; a live Knitweb/OriginTrail publisher can replace it with canonical CBOR CID while preserving record payloads.",
    "sourceAuthorLinking": "Sources carry author/creator/publisher fields and records link to sourceIds."
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      "id": "source:smartslag-kivi-2026-local-dossier",
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      "title": "SmartSlag KIVI voordracht / technisch dossier Plant One",
      "authors": [
        "Edwin Hauwert",
        "Fierig"
      ],
      "publisher": "SLAG B.V. i.s.m. Slakkenspoor",
      "date": "2026-03-17",
      "locator": "local:/Users/develuse/Documents/Admin/SLAG BV/Website/Slag/slag-chemistry.json",
      "accessStatus": "local_source_in_workspace",
      "usedFor": [
        "BOF slag oxide ranges",
        "process variables",
        "SmartSlag glossary terms"
      ],
      "note": "Operator-curated local source. Batch-specific assay certificates should supersede this range for regulated reporting.",
      "cid": "sha256:931527c86b90e5631f7aa355ff0aada1e0d7ded17eeb7ea7b4801d09e5e44c35",
      "ual": "did:dkg:knitweb/sha256-931527c86b90e5631f7aa355ff0aada1e0d7ded17eeb7ea7b4801d09e5e44c35"
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      "id": "source:yildirim-prezzi-2011-steel-slag-review",
      "type": "peer_reviewed_literature",
      "title": "Chemical, Mineralogical, and Morphological Properties of Steel Slag",
      "authors": [
        "I. Z. Yildirim",
        "M. Prezzi"
      ],
      "publisher": "Advances in Civil Engineering",
      "date": "2011",
      "doi": "10.1155/2011/463638",
      "url": "https://doi.org/10.1155/2011/463638",
      "accessStatus": "bibliographic_source_linked",
      "usedFor": [
        "BOF/steel slag composition context",
        "mineralogical context"
      ],
      "note": "Used as general steel slag literature support; local Tata IJmuiden batches still require direct assay.",
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    },
    {
      "id": "source:bro-geotop-gtm",
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      "title": "GeoTOP (GTM)",
      "authors": [
        "TNO Geologische Dienst Nederland"
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      "creator": "Rijkswaterstaat",
      "publisher": "Basisregistratie Ondergrond / Ministerie van Volkshuisvesting en Ruimtelijke Ordening",
      "dateModified": "2024-11-05",
      "url": "https://basisregistratieondergrond.nl/inhoud-bro/registratieobjecten/modellen/geotop-gtm/",
      "accessStatus": "public_metadata_checked_2026-06-28",
      "usedFor": [
        "North Holland lithology/depth model provenance",
        "clay sampling target provenance"
      ],
      "note": "GeoTOP gives subsurface lithology in 100 x 100 x 0.5 m voxels to max 50 m below NAP; it is not an oxide chemistry assay source.",
      "cid": "sha256:490c5f565be7d65350911a82e8a64ed268009fda66f8bd9a2a4a2e097dc0e951",
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    },
    {
      "id": "source:usgs-mcs-vanadium-2026",
      "type": "government_mineral_statistics",
      "title": "Mineral Commodity Summaries 2026: Vanadium",
      "authors": [
        "U.S. Geological Survey"
      ],
      "publisher": "U.S. Geological Survey",
      "date": "2026",
      "url": "https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-vanadium.pdf",
      "accessStatus": "public_pdf_checked_2026-06-28",
      "usedFor": [
        "V2O5 market validation",
        "vanadium product context"
      ],
      "note": "Used for market context only, not for local BOF or clay composition.",
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      "id": "source:eu-critical-raw-materials-act-2024-1252",
      "type": "law_policy_source",
      "title": "Regulation (EU) 2024/1252 establishing a framework for ensuring a secure and sustainable supply of critical raw materials",
      "authors": [
        "European Parliament",
        "Council of the European Union"
      ],
      "publisher": "Official Journal of the European Union",
      "date": "2024-05-03",
      "url": "https://eur-lex.europa.eu/eli/reg/2024/1252/oj",
      "accessStatus": "public_law_checked_2026-06-28",
      "usedFor": [
        "critical raw materials policy context"
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      "note": "Policy context, not composition data.",
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        "LD-slak",
        "basic oxygen furnace slag"
      ],
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        "North Holland clay"
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        "basic oxygen furnace slag",
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        "country": "NL",
        "coordinateStatus": "not_in_public_dataset"
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      "unitPolicy": "Major oxides are stored as wt_pct_basis_points where 100 bp = 1 wt%; trace scandium as ppm_mg_per_kg.",
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          "maxBp": 4500,
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          "sourceIds": [
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          ],
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          "sourceIds": [
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          "sourceIds": [
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          "sourceIds": [
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          "sourceIds": [
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          "sourceIds": [
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          "sourceIds": [
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          "sourceIds": [
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        "originTrailStatus": "prepared_not_published",
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      "lithologyTarget": "near-coastal Holocene clay sampling target",
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        "sourceIds": [
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      "materialNames": [
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      "measurementStatus": "not_measured_in_attached_source",
      "sourceIds": [
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      "site": {
        "name": "Amsterdam Westelijk Havengebied / IJpolder",
        "province": "Noord-Holland",
        "country": "NL",
        "coordinateStatus": "location_name_only_until_sampling_plan_is_surveyed"
      },
      "targetDepthIntervalCm": [
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      ],
      "lithologyTarget": "deeper clay/peat-clay interval target",
      "composition": {},
      "comparisonUse": "Use this record as a location/depth mass-balance template only; do not calculate numeric enrichment until lab XRF/ICP values and dry-basis closure are attached.",
      "missingCompositionReason": "The attached public source supports lithology/depth modelling, not measured oxide or trace-element chemistry for this named location/depth.",
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        "sourceIds": [
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      }
    },
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      "id": "record:nh-clay:beemster:0-50cm:v1",
      "kind": "composition_record",
      "materialId": "material:noord-holland-clay",
      "materialNames": [
        "Noord-Hollandse klei",
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        "North Holland clay",
        "marine clay"
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      "recordType": "sampling_target_pending_lab_measurement",
      "measurementStatus": "not_measured_in_attached_source",
      "sourceIds": [
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      "site": {
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        "province": "Noord-Holland",
        "country": "NL",
        "coordinateStatus": "location_name_only_until_sampling_plan_is_surveyed"
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      "targetDepthIntervalCm": [
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      "lithologyTarget": "reclaimed marine clay topsoil target",
      "composition": {},
      "comparisonUse": "Use this record as a location/depth mass-balance template only; do not calculate numeric enrichment until lab XRF/ICP values and dry-basis closure are attached.",
      "missingCompositionReason": "The attached public source supports lithology/depth modelling, not measured oxide or trace-element chemistry for this named location/depth.",
      "requiredAssayFields": [
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        "chemicalClosureStatus": "not_closed_no_lab_assay_attached",
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          "Cr_ppm",
          "MnO_or_Mn_ppm",
          "LOI"
        ],
        "sourceIds": [
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    },
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          ],
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      },
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      ],
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          ]
        },
        {
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        },
        {
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          "sourceIds": [
            "source:bro-geotop-gtm"
          ]
        }
      ],
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        {
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        },
        {
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        {
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        },
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        },
        {
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        },
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        },
        {
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        },
        {
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        },
        {
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        },
        {
          "term": "targetDepthIntervalCm",
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          ],
          "sourceIds": [
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        },
        {
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          ]
        },
        {
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        }
      ],
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        },
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        },
        {
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        {
          "component": "MgO",
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        },
        {
          "component": "K2O",
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        },
        {
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        },
        {
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        },
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      ],
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      },
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        },
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        },
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        }
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          "sourceIds": [
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        },
        {
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        },
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        },
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        },
        {
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        },
        {
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        {
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        },
        {
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        },
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        },
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        },
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        {
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        },
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        },
        {
          "component": "K2O",
          "requiredFor": "BOF-versus-Noord-Holland-clay enrichment factor and dry-mass closure",
          "valueStatus": "pending_lab_measurement"
        },
        {
          "component": "Na2O",
          "requiredFor": "BOF-versus-Noord-Holland-clay enrichment factor and dry-mass closure",
          "valueStatus": "pending_lab_measurement"
        },
        {
          "component": "TiO2",
          "requiredFor": "BOF-versus-Noord-Holland-clay enrichment factor and dry-mass closure",
          "valueStatus": "pending_lab_measurement"
        },
        {
          "component": "P2O5",
          "requiredFor": "BOF-versus-Noord-Holland-clay enrichment factor and dry-mass closure",
          "valueStatus": "pending_lab_measurement"
        },
        {
          "component": "V_ppm",
          "requiredFor": "BOF-versus-Noord-Holland-clay enrichment factor and dry-mass closure",
          "valueStatus": "pending_lab_measurement"
        },
        {
          "component": "Cr_ppm",
          "requiredFor": "BOF-versus-Noord-Holland-clay enrichment factor and dry-mass closure",
          "valueStatus": "pending_lab_measurement"
        },
        {
          "component": "MnO_or_Mn_ppm",
          "requiredFor": "BOF-versus-Noord-Holland-clay enrichment factor and dry-mass closure",
          "valueStatus": "pending_lab_measurement"
        },
        {
          "component": "LOI",
          "requiredFor": "BOF-versus-Noord-Holland-clay enrichment factor and dry-mass closure",
          "valueStatus": "pending_lab_measurement"
        }
      ],
      "comparisonLock": "Do not calculate numeric BOF-vs-clay enrichment from this mass balance until measured clay composition values with method, source, author/lab, location and depth are attached.",
      "provenance": {
        "sourceAuthorLinkStatus": "model_source_linked_author_supplier_present",
        "originTrailStatus": "prepared_not_published",
        "factBoundary": "Mass-balance template only; public source supports lithology/depth target provenance, not measured chemistry."
      },
      "cid": "sha256:3837a9c85c5dde5bb7d729586feb6770e101a1cbf3966d668aab4d640b6d4ef0",
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    },
    {
      "id": "massbalance:nh-clay:west-friesland-enkhuizen:150-350cm:1000kg-dry:v1",
      "kind": "clay_dry_mass_balance_template",
      "recordId": "record:nh-clay:west-friesland-enkhuizen:150-350cm:v1",
      "materialId": "material:noord-holland-clay",
      "materialNames": [
        "Noord-Hollandse klei",
        "Hollandse klei",
        "North Holland clay",
        "marine clay"
      ],
      "site": {
        "name": "West-Friesland / Enkhuizen",
        "province": "Noord-Holland",
        "country": "NL",
        "coordinateStatus": "location_name_only_until_sampling_plan_is_surveyed"
      },
      "targetDepthIntervalCm": [
        150,
        350
      ],
      "lithologyTarget": "subsoil clay target",
      "sourceIds": [
        "source:bro-geotop-gtm"
      ],
      "status": "structural_mass_balance_pending_lab_composition",
      "basis": {
        "dryMassKg": 1000,
        "unit": "kg_dry_clay",
        "note": "Planning basis for comparing one tonne dry clay sampling target with one tonne BOF slag; not a measured oxide total."
      },
      "knownStructuralTerms": [
        {
          "term": "location",
          "value": "West-Friesland / Enkhuizen",
          "sourceIds": [
            "source:bro-geotop-gtm"
          ]
        },
        {
          "term": "targetDepthIntervalCm",
          "value": [
            150,
            350
          ],
          "sourceIds": [
            "source:bro-geotop-gtm"
          ]
        },
        {
          "term": "lithologyTarget",
          "value": "subsoil clay target",
          "sourceIds": [
            "source:bro-geotop-gtm"
          ]
        },
        {
          "term": "basisDryMassKg",
          "value": 1000,
          "sourceIds": [
            "source:bro-geotop-gtm"
          ]
        }
      ],
      "chemicalClosure": {
        "measuredOxideTotalKg": null,
        "measuredTraceTotalKg": null,
        "measuredLoiKg": null,
        "unassignedDryMassKg": 1000,
        "closureStatus": "not_closed_no_lab_assay_attached",
        "closureRule": "Measured oxide wt_pct plus LOI/moisture/residual terms must close to 100 wt% dry basis before numeric enrichment is unlocked."
      },
      "requiredAssayFields": [
        {
          "component": "SiO2",
          "requiredFor": "BOF-versus-Noord-Holland-clay enrichment factor and dry-mass closure",
          "valueStatus": "pending_lab_measurement"
        },
        {
          "component": "Al2O3",
          "requiredFor": "BOF-versus-Noord-Holland-clay enrichment factor and dry-mass closure",
          "valueStatus": "pending_lab_measurement"
        },
        {
          "component": "Fe2O3",
          "requiredFor": "BOF-versus-Noord-Holland-clay enrichment factor and dry-mass closure",
          "valueStatus": "pending_lab_measurement"
        },
        {
          "component": "CaO",
          "requiredFor": "BOF-versus-Noord-Holland-clay enrichment factor and dry-mass closure",
          "valueStatus": "pending_lab_measurement"
        },
        {
          "component": "MgO",
          "requiredFor": "BOF-versus-Noord-Holland-clay enrichment factor and dry-mass closure",
          "valueStatus": "pending_lab_measurement"
        },
        {
          "component": "K2O",
          "requiredFor": "BOF-versus-Noord-Holland-clay enrichment factor and dry-mass closure",
          "valueStatus": "pending_lab_measurement"
        },
        {
          "component": "Na2O",
          "requiredFor": "BOF-versus-Noord-Holland-clay enrichment factor and dry-mass closure",
          "valueStatus": "pending_lab_measurement"
        },
        {
          "component": "TiO2",
          "requiredFor": "BOF-versus-Noord-Holland-clay enrichment factor and dry-mass closure",
          "valueStatus": "pending_lab_measurement"
        },
        {
          "component": "P2O5",
          "requiredFor": "BOF-versus-Noord-Holland-clay enrichment factor and dry-mass closure",
          "valueStatus": "pending_lab_measurement"
        },
        {
          "component": "V_ppm",
          "requiredFor": "BOF-versus-Noord-Holland-clay enrichment factor and dry-mass closure",
          "valueStatus": "pending_lab_measurement"
        },
        {
          "component": "Cr_ppm",
          "requiredFor": "BOF-versus-Noord-Holland-clay enrichment factor and dry-mass closure",
          "valueStatus": "pending_lab_measurement"
        },
        {
          "component": "MnO_or_Mn_ppm",
          "requiredFor": "BOF-versus-Noord-Holland-clay enrichment factor and dry-mass closure",
          "valueStatus": "pending_lab_measurement"
        },
        {
          "component": "LOI",
          "requiredFor": "BOF-versus-Noord-Holland-clay enrichment factor and dry-mass closure",
          "valueStatus": "pending_lab_measurement"
        }
      ],
      "comparisonLock": "Do not calculate numeric BOF-vs-clay enrichment from this mass balance until measured clay composition values with method, source, author/lab, location and depth are attached.",
      "provenance": {
        "sourceAuthorLinkStatus": "model_source_linked_author_supplier_present",
        "originTrailStatus": "prepared_not_published",
        "factBoundary": "Mass-balance template only; public source supports lithology/depth target provenance, not measured chemistry."
      },
      "cid": "sha256:0c057e16097112be84126e928e20d87c654c36a467f17efd9537c9b014986174",
      "ual": "did:dkg:knitweb/sha256-0c057e16097112be84126e928e20d87c654c36a467f17efd9537c9b014986174"
    }
  ]
}