Struct Field 

pub struct Field {

    pub id: String,
    pub display_name: Option<String>,
    pub description: Option<String>,
    pub ids: Option<HierarchyIds>,
    pub display_name_alternatives: Option<Vec<String>>,
    pub domain: Option<HierarchyEntity>,
    pub subfields: Option<Vec<HierarchyEntity>>,
    pub siblings: Option<Vec<HierarchyEntity>>,
    pub works_count: Option<i64>,
    pub cited_by_count: Option<i64>,
    pub works_api_url: Option<String>,
    pub updated_date: Option<String>,
    pub created_date: Option<String>,
}

An academic field in OpenAlex’s topic hierarchy.

Fields are the second level: domain > field > subfield > topic. There are 26 fields (e.g. Computer Science, Medicine, Mathematics).

Example

{
  "id": "https://openalex.org/fields/17",
  "display_name": "Computer Science",
  "domain": {"id": "https://openalex.org/domains/3", "display_name": "Physical Sciences"},
  "subfields": [{"id": "https://openalex.org/subfields/1702", "display_name": "Artificial Intelligence"}, ...],
  "works_count": 22038624
}

ID formats

Fields use numeric IDs (e.g. 17 for Computer Science).

Note

Fields do not support autocomplete (/autocomplete/fields returns 404).

Fields

id: String

OpenAlex ID URI (e.g. "https://openalex.org/fields/17").

display_name: Option<String>

Human-readable field name (e.g. "Computer Science").

description: Option<String>

Brief description of the field’s scope.

ids: Option<HierarchyIds>

External identifiers (OpenAlex, Wikidata, Wikipedia).

display_name_alternatives: Option<Vec<String>>

Alternative names or name variants.

domain: Option<HierarchyEntity>

The parent domain this field belongs to.

subfields: Option<Vec<HierarchyEntity>>

Research subfields within this field.

siblings: Option<Vec<HierarchyEntity>>

Other fields at the same level in the hierarchy.

works_count: Option<i64>

Total number of works in this field.

cited_by_count: Option<i64>

Total number of citations received by works in this field.

works_api_url: Option<String>

API URL to retrieve works in this field.

updated_date: Option<String>

ISO 8601 timestamp of the last update to this record.

created_date: Option<String>

ISO 8601 date when this record was first created.

Trait Implementations

impl Clone for Field

fn clone(&self) -> Field

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Field

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Field

fn deserialize<__D>( __deserializer: __D, ) -> Result<Field, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<Field> for FieldSummary

fn from(f: Field) -> Self

Converts to this type from the input type.

impl Serialize for Field

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.