Topic object

These are the fields in a topic object. When you use the API to get a single topic or lists of topics, this is what's returned.

cited_by_count

Integer: The number of citations to works that have been tagged with this topic. Or less formally: the number of citations to this topic.

For example, if there are just two works tagged with this topic and one of them has been cited 10 times, and the other has been cited 1 time, cited_by_count for this topic would be 11.

cited_by_count: 141754 

created_date

String: The date this Topic object was created in the OpenAlex dataset, expressed as an ISO 8601 date string.

created_date: "2024-01-23"

description

String: A description of this topic, generated by AI.

description: "This cluster of papers explores the intersection of artificial intelligence and medicine, focusing on applications in healthcare, medical imaging, clinical decision support, and the ethical challenges associated with AI implementation. It delves into topics such as machine learning, big data, precision medicine, and the potential impact of AI on health equity."

display_name

String: The English-language label of the topic.

display_name: "Artificial Intelligence in Medicine"

domain

Object: The ID and the name (display_name) for the domain of this topic. The domain is the highest level in the "domain, field, subfield, topic" system, which means it is the least granular. See the topics overview for more explanation and a diagram.

domain: {
    id: 4,
    display_name: "Health Sciences"
}

field

Object: The ID and the name (display_name) for the field of this topic. The field is the second-highest level in the "domain, field, subfield, topic" system, which means it is the second-least granular. See the topics overview for more explanation and a diagram.

field: {
    id: 27,
    display_name: "Medicine"
}

id

String: The OpenAlex ID for this topic.

id: "https://openalex.org/T11636"

ids

Object: All the external identifiers that we know about for this topic. IDs are expressed as URIs whenever possible. Possible ID types:

• openalex (String: this topic's OpenAlex ID. Same as Topic.id)

• wikipedia (String: this topic's Wikipedia page URL)

ids: {
    openalex: "https://openalex.org/T11636",
    wikipedia: "https://en.wikipedia.org/wiki/Artificial_intelligence_in_healthcare"
}

keywords

List: Keywords consisting of one or several words each, meant to represent the content of the papers in the topic. These keywords were generated as part of the AI model. For now, they are provided as-is, but we will be providing more support and documenting them more thoroughly.

keywords: [
    "Artificial Intelligence",
    "Machine Learning",
    "Healthcare",
    "Medical Imaging",
    "Clinical Decision Support",
    ...
]

subfield

Object: The ID and the name (display_name) for the subfield of this topic. The subfield is the third-highest level in the "domain, field, subfield, topic" system, which means it is the third-least granular. See the topics overview for more explanation and a diagram.

subfield: {
    id: 2718,
    display_name: "Health Informatics"
}

updated_date

String: The last time anything in this topic object changed, expressed as an ISO 8601 date string. This date is updated for any change at all, including increases in various counts.

updated_date: "2024-02-05T05:00:03.798420"

works_count

Integer: The number of works tagged with this topic.

works_count: 21737