Concepts (deprecated) Overview

Schema reference for Concepts (deprecated) entities

Concepts are deprecated and have been replaced by Topics.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 They have been replaced by the Topics system, which provides more accurate and comprehensive classification.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	✓	✓	✓