Issues

• Widening base_uri to the namespace doubles the prefix in short forms and CURIEs (COHO_COHO_0000003)

  bugdataload
  EBISPOT/ols4#1449 · Filter by author jamesamcl opened on Sep 29, 2026

• Ontology-scoped llm_search bypasses the HNSW index and scans the whole ontology (5–15× slower than the global search)

  backendperformancesemantic-search
  EBISPOT/ols4#1445 · Filter by author jamesamcl opened on Sep 27, 2026

• Homepage, tracker and mailing list are no longer read from the ontology header (regression from OLS 3)

  EBISPOT/ols4#1441 · Filter by author jamesamcl opened on Sep 22, 2026

• [Feature request] Public service-status page for the production OLS4 services

  low prioritynice-to-haveols4-new-feature
  EBISPOT/ols4#1342 · Filter by author M-casado opened on Jul 31, 2026

• Label rendering: fall back to rdfs:label before the short-form ID (e.g. MIXS_AeroStrucEnum)

  EBISPOT/ols4#1261 · Filter by author turbomam opened on Jun 2, 2026
  1

• Tree browser shows redundant edges

  EBISPOT/ols4#1252 · Filter by author cmungall opened on May 19, 2026
  2

  

• Figure out a way to tell user if they viewing outdated ontology

  ols4-new-feature
  EBISPOT/ols4#1250 · Filter by author haideriqbal opened on May 12, 2026
  

• Add microntology (MICRONT) to OLS

  new ontology
  EBISPOT/ols4#1240 · Filter by author defleury opened on Apr 28, 2026

• Question: Enabling LLM-Based Semantic Search on a Self-Hosted OLS4 Instance

  EBISPOT/ols4#1238 · Filter by author markwilkinson opened on Apr 27, 2026
  1

• Change to the AI assisted search

  ols4-new-feature
  EBISPOT/ols4#1163 · Filter by author helenp opened on Feb 2, 2026

• Interpretation of isDefinedBy

  bug
  EBISPOT/ols4#1160 · Filter by author jamesamcl opened on Jan 29, 2026
  5

• Separating ontologies and schemas

  EBISPOT/ols4#1039 · Filter by author jamesamcl opened on Oct 30, 2025
  1

  

• Include more metadata in the MCP term info payload

  EBISPOT/ols4#1015 · Filter by author cmungall opened on Oct 23, 2025
  2

• Improve OLS API autosuggest to support fuzzy matching and typo tolerance

  low priorityols4-new-featuresemantic-search
  EBISPOT/ols4#1010 · Filter by author Angatar opened on Oct 20, 2025
  1

• Add the ability to filter by ontology ID to the llm_similar endpoint

  ols4-new-feature
  EBISPOT/ols4#981 · Filter by author jamesamcl opened on Sep 18, 2025

• Add examples for MCP server configuration for Cursor, Claude, VS code to the frontend MCP docs page

  ols4-new-feature
  EBISPOT/ols4#976 · Filter by author jamesamcl opened on Sep 15, 2025
  2

• Searching definitions

  low priorityols4-new-featuresemantic-search
  EBISPOT/ols4#958 · Filter by author noamrotenberg opened on Aug 15, 2025

• Search & visualize ontology subsets

  low priorityols4-new-feature
  EBISPOT/ols4#957 · Filter by author noamrotenberg opened on Aug 15, 2025

• Show matching synonym when searching

  low priorityols4-new-feature
  EBISPOT/ols4#956 · Filter by author noamrotenberg opened on Aug 14, 2025

• Confusing attributions in imports

  buglow priority
  EBISPOT/ols4#944 · Filter by author cthoyt opened on Jul 30, 2025
  3

• EFO importing incorrect MONDO mapping for Orphanet:761

  EBISPOT/ols4#1040 · Filter by author cdiaz45 opened on Jul 28, 2025
  3

• Incorrect short form for MeSH terms

  bug
  EBISPOT/ols4#935 · Filter by author cthoyt opened on Jul 21, 2025
  4

• Ontology tree view needs improvement

  bug
  EBISPOT/ols4#908 · Filter by author amalik01 opened on Jun 13, 2025
  2

• Support for Individual hierarchies in Tree View

  ols4-new-feature
  EBISPOT/ols4#873 · Filter by author hkir-dev opened on Mar 31, 2025
  2

• Case sensitive filename warnings when cloning the repo

  bug
  EBISPOT/ols4#871 · Filter by author jamesamcl opened on Mar 21, 2025