Retrieve property labels of nodes

This endpoint is suitable for situations in which you have a node or list of nodes and desire to obtain the labels of all properties defined for those nodes.

General information about this endpoint

URL: /node/property-labels

Methods available: GET, POST

Required arguments:

  • dcids: A list of nodes to query, identified by DCID.

How to construct a request to the property label endpoint

Step 1: Assembling the information you will need

This endpoint requires the argument dcids, which are unique node identifiers defined by Data Commons. Your query will need to specify the DCIDs for the nodes of interest.

Step 2: Creating the request

When actually putting together your request, you can choose from two options. If you intend to query only a small number of DCIDs, you may want to use the simpler formatting offered by the GET method. For larger numbers of DCIDs, or if you prefer to utilize a static URL, a POST request likely makes more sense. To use it, make a POST request against the main endpoint while changing the fields of the JSON body it sends.

What to expect in the response

Your response will always look like this:

{
    "payload": "<payload string>",
}

Here "<payload string>" is a long encoded JSON string, whose structure changes depending on whether the response contains node references. You can run JSON.parse() on the payload field to retrieve the data. For example, in JavaScript: var data = JSON.parse(response['payload']).

Here is the structure the response payload string adheres to after decoding:

{
    "<dcid>": {
        "inLabels": [
            "<label>",
            ...
        ],
        "outLabels": [
            "<label>",
            ...
        ]
    },
    ...
}

For each node, inLabels contains labels directed towards the node while outLabels contains labels directed away from the node. For more information on the in and out directions, check out the property value REST endpoint documentation.

Example requests and responses

Example 1: Retrieve the property labels of Wisconsin’s eighth congressional district.

  • curl --request GET \
  --url 'https://api.datacommons.org/node/property-labels?dcids=geoId%2F5508'

  • curl --request POST \
  --url https://api.datacommons.org/node/property-labels \
  --header 'content-type: application/json' \
  --data '{
	"dcids": [
		"geoId/5508"
	]
}'

Response

Raw
{
  "payload": "{\"geoId/5508\":{\"inLabels\":[\"containedInPlace\",\"geoOverlaps\",\"location\"],\"outLabels\":[\"containedInPlace\",\"geoId\",\"geoJsonCoordinates\",\"geoOverlaps\",\"kmlCoordinates\",\"landArea\",\"latitude\",\"longitude\",\"name\",\"provenance\",\"typeOf\",\"waterArea\"]}}"
}
Parsed and prettified
{
  "payload": {
    "geoId/5508": {
      "inLabels": [
        "containedInPlace",
        "geoOverlaps",
        "location"
      ],
      "outLabels": [
        "containedInPlace",
        "geoId",
        "geoJsonCoordinates",
        "geoOverlaps",
        "kmlCoordinates",
        "landArea",
        "latitude",
        "longitude",
        "name",
        "provenance",
        "typeOf",
        "waterArea"
      ]
    }
  }
}

Example 2: Retrieve the property labels of two different leukocyte cell lines.

  • curl --request GET \
  --url 'https://api.datacommons.org/node/property-labels?dcids=dc%2Fc3j78rpyssdmf&dcids=dc%2F7hfhd2ek8ppd2'

  • curl --request POST \
  --url https://api.datacommons.org/node/property-labels \
  --header 'content-type: application/json' \
  --data '{
    "dcids": [
      "dc/c3j78rpyssdmf",
      "dc/7hfhd2ek8ppd2"
    ]
  }'

Response

Raw
{
  "payload": "{\"dc/7hfhd2ek8ppd2\":{\"inLabels\":[\"biosampleOntology\"],\"outLabels\":[\"cellSlims\",\"classification\",\"dbxrefs\",\"developmentalSlims\",\"encodeUUID\",\"name\",\"organSlims\",\"provenance\",\"sameAs\",\"status\",\"systemSlims\",\"termId\",\"termName\",\"typeOf\"]},\"dc/c3j78rpyssdmf\":{\"inLabels\":[\"biosampleOntology\"],\"outLabels\":[\"cellSlims\",\"classification\",\"dbxrefs\",\"encodeUUID\",\"name\",\"provenance\",\"sameAs\",\"status\",\"systemSlims\",\"termId\",\"termName\",\"typeOf\"]}}"
}
Parsed and prettified
{
  "payload": {
    "dc/7hfhd2ek8ppd2": {
      "inLabels": [
        "biosampleOntology"
      ],
      "outLabels": [
        "cellSlims",
        "classification",
        "dbxrefs",
        "developmentalSlims",
        "encodeUUID",
        "name",
        "organSlims",
        "provenance",
        "sameAs",
        "status",
        "systemSlims",
        "termId",
        "termName",
        "typeOf"
      ]
    },
    "dc/c3j78rpyssdmf": {
      "inLabels": [
        "biosampleOntology"
      ],
      "outLabels": [
        "cellSlims",
        "classification",
        "dbxrefs",
        "encodeUUID",
        "name",
        "provenance",
        "sameAs",
        "status",
        "systemSlims",
        "termId",
        "termName",
        "typeOf"
      ]
    }
  }
}

Error Responses

If your request is malformed in some way, you will receive a 400 status code and an error message like the following:

{
  "code": 3,
  "message": "Missing required arguments: dcid",
  "details": [
    {
      "@type": "type.googleapis.com/google.rpc.DebugInfo",
      "stackEntries": [],
      "detail": "internal"
    }
  ]
}