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A Product (LCA) is a modeled footprint with a bill of materials - its Inputs point to Elements (Materials, Energy, Transport, or Process), to sub-Products, or to Datasets directly. A Material is one kind of Element; it gets its impacts by referencing a Dataset directly rather than modeling its own BOM. Datasets are the original source of impact data. See Data Model for the full picture.
API documentation: Product , Material , Database search

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Attributes

AttributeTypeDescriptionExample
uuidstringThe unique identifier123e4567-e89b-12d3-a456-426614174000
namestringThe name of the materialSteel
skustringThe stock keeping unitST123
unitUnitThe unit of measurekg
weightAmountThe user-declared weight of the material{ quantity: 100, unit: "kg" }
packagingWeightAmountThe user-declared weight of the material’s packaging{ quantity: 10, unit: "kg" }
modeledWeightAmountRead-only. Server-computed sum of the model’s A1–A3 product material input weights (Material group “Product”; excludes packaging and ancillary){ quantity: 100, unit: "kg" }
modeledPackagingWeightAmountRead-only. Server-computed sum of the model’s A1–A3 packaging input weights (Material group “Packaging”); compare against the declared packagingWeight{ quantity: 12.5, unit: "kg" }
modeledTotalWeightAmountRead-only. Gross modeled weight: modeledWeight + modeledPackagingWeight, derived at read time (a missing addend contributes nothing); present when at least one of the two is present{ quantity: 112.5, unit: "kg" }
recycledPercentnumberThe user-declared recycled content of the material as a percentage (0–100). A 0 is a declared zero; absent when undeclared30
modeledRecycledPercentnumberRead-only. Server-computed weight-weighted average of the contributing inputs’ recycled content (0–100); compare against the declared recycledPercent27.5
startDatedateThe date the model is valid from2021-01-01
endDatedateThe date the model is valid until2021-12-31
dataQualityIndicatorsobjectInformation about the quality of the material{ technologicalDQR: 2, ... }
dataQualityRatingnumberA number from 1 to 3 representing the quality of the material1
taxonomyTaxonomyThe category of the materialSteel
geoLocationGeoLocationThe location of the materialPittsburgh, PA
locationLocationThe named location of the materialPittsburgh Warehouse
dataSourcesDataSourceThe source of the data[{ name: "ecoinvent" }]
createddateThe date the material was created2021-01-01T00:00:00.000Z
updateddateThe date the material was last updated2021-01-22T00:00:00.000Z

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Data Quality

Both of these follow the Pathfinder framework, with some additional fields on the dataQualityIndicators object. The dataQualityIndicators object contains information about the quality of the material. 
{
  "documentationYear": 2022,
  "coveragePercent": 100,
  "specificPercent": 0,
  "averagePercent": 100,
  "technologicalDQR": 2,
  "temporalDQR": 2,
  "geographicalDQR": 2,
  "completenessDQR": 1,
  "reliabilityDQR": 1
}
The dataQualityRating is a number from 1 to 3 that represents the quality of the material (1 being the best). 
{
  "dataQualityRating": 1
}

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Footprint

The footprint.CO2e object holds the CO2e values for the Product / Material. 
{
  "CO2e": {
    "totalCarbonFootprint": "1234.5678",
    "productCarbonFootprint": "1234.0",
    "upstream": "1230.0",
    "direct": "4.0",
    "downstream": "0.0678",
    "A1_A3": "1234.0",
    "A1": "1200.0",
    "A2": "30.0",
    "A3": "4.0",
    "A4": "0.5",
    "B1": "0.06",
    "B2": "0.007",
    "B3": "0.0008",
    "B4": "",
    "B5": "",
    "C1": "",
    "C2": "",
    "C3": "",
    "C4": "",
    "D": ""
  }
}

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Diagram