Concepts were a hierarchical taxonomy of research areas derived from Wikidata. They have been replaced by the Topics system, which provides more accurate and comprehensive classification.Documentation Index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 concepts fields. See Filtering, Sorting, and Grouping for syntax. Fields marked (deprecated) are.search filters — use the search parameter instead.
| Field | Sort | Group_by | Filter |
|---|---|---|---|
ancestors.id | ✓ | ✓ | ✓ |
cited_by_count | ✓ | ✓ | ✓ |
default.search (deprecated) | ✓ | ||
display_name | ✓ | ✓ | |
display_name.search (deprecated) | ✓ | ||
from_created_date | ✓ | ✓ | |
has_wikidata | ✓ | ✓ | ✓ |
ids.openalex | ✓ | ✓ | ✓ |
level | ✓ | ✓ | ✓ |
openalex | ✓ | ✓ | ✓ |
openalex_id | ✓ | ✓ | |
summary_stats.2yr_mean_citedness | ✓ | ✓ | |
summary_stats.h_index | ✓ | ✓ | |
summary_stats.i10_index | ✓ | ✓ | |
wikidata_id | ✓ | ✓ | |
works_count | ✓ | ✓ | ✓ |