/v1/triples

Get a triple.

Useful for finding local connections between nodes of the Data Commons knowledge graph.

Request

GET Request

http://api.datacommons.org/v1/triples/{EDGE_DIRECTION}/{NODE_DCID}?key={api_key}

Path Parameters

Name Description
EDGE_DIRECTION
Required		 One of in or out. Denotes direction of edges to get triples for.

If in, returns triples with edges pointing toward the node provided. If out, returns triples with edges pointing away from the node provided.
NODE_DCID
Required		 DCID of the node to query.

Query Parameters

Name Type Description
key
Required		 string Your API key. See the page on authentication for a demo key, as well as instructions on how to get your own key.

Response

The response looks like:

{
  "triples":
  {
    "property_describing_node_queried_1":
    {
      "nodes":
      [
        {
          "property_1": "value",
          "property_2": "value",
          ...
        }, ...
      ]
    }, ...
  }
}

Response fields

Name Type Description
triples object A nested JSON object containing DCIDs of both properties that describe the node queried, and nodes connected to the queried node via those properties.

Examples

Example 1: Get triples of outgoing edges

Get triples for the node representing Carbon Dioxide (DCID: CarbonDioxide), where edges point away from the node for Carbon Dioxide.

Request:

  $ curl --request GET --url \
  'https://api.datacommons.org/v1/triples/out/CarbonDioxide?key=AIzaSyCTI4Xz-UW_G2Q2RfknhcfdAnTHq5X5XuI'

Response:

{
  "triples": {
    "description": {
      "nodes": [
        {
          "provenanceId": "dc/5l5zxr1",
          "value": "A colorless gas consisting of a carbon atom covalently double bonded to two oxygen atoms."
        }
      ]
    },
    "descriptionUrl": {
      "nodes": [
        {
          "provenanceId": "dc/5l5zxr1",
          "value": "https://en.wikipedia.org/wiki/Carbon_dioxide"
        }
      ]
    },
    "name": {
      "nodes": [
        {
          "provenanceId": "dc/5l5zxr1",
          "value": "Carbon Dioxide"
        },
        {
          "provenanceId": "dc/5l5zxr1",
          "value": "CarbonDioxide"
        }
      ]
    },
    "provenance": {
      "nodes": [
        {
          "name": "https://datacommons.org",
          "types": ["Provenance"],
          "dcid": "dc/5l5zxr1",
          "provenanceId": "dc/5l5zxr1"
        }
      ]
    },
    "typeOf": {
      "nodes": [
        {
          "name": "GasType",
          "types": ["Class"],
          "dcid": "GasType",
          "provenanceId": "dc/5l5zxr1"
        },
        {
          "name": "GreenhouseGas",
          "types": ["Class"],
          "dcid": "GreenhouseGas",
          "provenanceId": "dc/5l5zxr1"
        }
      ]
    }
  }
}

Example 2: Get triples of incoming edges

Get triples for the node representing Carbon Dioxide (DCID: CarbonDioxide), where edges point towards the node Carbon Dioxide.

Request:

  $ curl --request GET --url \
  'https://api.datacommons.org/v1/triples/in/CarbonDioxide?key=AIzaSyCTI4Xz-UW_G2Q2RfknhcfdAnTHq5X5XuI'

Response:

{
  "triples": {
    "emittedThing": {
      "nodes": [
        {
          "name": "CO2 Emissions Per Capita",
          "types": ["StatisticalVariable"],
          "dcid": "Amount_Emissions_CarbonDioxide_PerCapita",
          "provenanceId": "dc/d7tbsb1"
        },
        {
          "name": "Annual Amount of Emissions: Biogenic Emission Source, Carbon Dioxide",
          "types": ["StatisticalVariable"],
          "dcid": "Annual_Emissions_CarbonDioxide_Biogenic",
          "provenanceId": "dc/d7tbsb1"
        },
        {
          "name": "Annual Amount of Emissions: Non Biogenic Emission Source, Carbon Dioxide",
          "types": ["StatisticalVariable"],
          "dcid": "Annual_Emissions_CarbonDioxide_NonBiogenic",
          "provenanceId": "dc/d7tbsb1"
        },
        {
          "types": ["StatisticalVariable"],
          "dcid": "dc/pelkj2pkyww1",
          "provenanceId": "dc/6zzrcr2"
        }
      ]
    }
  }
}

Page last updated: October 24, 2025 • Send feedback about this page