Topics are research areas automatically assigned to works. Topics exist in a four-level hierarchy: domain > field > subfield > topic.Documentation Index
Fetch the complete documentation index at: https://developers.openalex.org/llms.txt
Use this file to discover all available pages before exploring further.
Filter, sort, and group_by fields
The API supports filtering, sorting, and grouping on topics fields. See Filtering, Sorting, and Grouping for syntax. Fields marked (deprecated) are.search filters — use the search parameter instead.
| Field | Sort | Group_by | Filter |
|---|---|---|---|
cited_by_count | ✓ | ✓ | ✓ |
default.search (deprecated) | ✓ | ||
description.search (deprecated) | ✓ | ||
display_name | ✓ | ✓ | |
display_name.search (deprecated) | ✓ | ||
domain.id | ✓ | ✓ | ✓ |
field.id | ✓ | ✓ | ✓ |
from_created_date | ✓ | ✓ | |
id | ✓ | ✓ | ✓ |
ids.openalex | ✓ | ✓ | ✓ |
keywords.search (deprecated) | ✓ | ||
openalex | ✓ | ✓ | ✓ |
subfield.id | ✓ | ✓ | ✓ |
works_count | ✓ | ✓ | ✓ |