Concepts (deprecated) Overview
Warning: Concepts are deprecated and have been replaced by Topics. The concepts endpoints remain functional but will not receive updates.
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 They have been replaced by the Topics system, which provides more accurate and comprehensive classification.
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 |
✓ | ✓ | ✓ |