Search LOINC terms (observations/measurements — the main LOINC table). Use this for lab tests, vital signs, clinical measurements, panels, and surveys — anything you'd look up by a test name like 'hemoglobin', 'sodium serum', or a LOINC number. Results are relevance-ranked by the LOINC Search API (same ranking as the loinc.org/search UI); if the top hits miss, reformulate the query rather than deep-paging. Rows are compact for triage — call get_loinc(code) to drill into the full record for a specific LOINC. Output is a TOON table capped to a character budget; when truncated, page with offset.

Search LOINC answer lists (the enumerated answer sets attached to survey/nominal terms, e.g. smoking-status choices). Use when you need the allowed answers for a term rather than the term itself. Results are relevance-ranked by the LOINC Search API (same ranking as the loinc.org/search UI); if the top hits miss, reformulate the query rather than deep-paging. Rows are compact for triage — call get_loinc(code) to drill into the full record for a specific LOINC. Output is a TOON table capped to a character budget; when truncated, page with offset.

Search LOINC parts (the LP-coded building blocks — components, systems, methods, properties — that compose LOINC terms). Use when you need the canonical part behind a concept, or to explore the axis vocabulary. Results are relevance-ranked by the LOINC Search API (same ranking as the loinc.org/search UI); if the top hits miss, reformulate the query rather than deep-paging. Rows are compact for triage — call get_loinc(code) to drill into the full record for a specific LOINC. Output is a TOON table capped to a character budget; when truncated, page with offset.

Search LOINC groups (curated collections of related terms — e.g. all glucose measurements, or a molecular-conversion group). Use when you want a pre-grouped set of related LOINCs rather than individual terms. Results are relevance-ranked by the LOINC Search API (same ranking as the loinc.org/search UI); if the top hits miss, reformulate the query rather than deep-paging. Rows are compact for triage — call get_loinc(code) to drill into the full record for a specific LOINC. Output is a TOON table capped to a character budget; when truncated, page with offset.

Drill into one LOINC term by its exact code (e.g. '783-1') and return the full flat record — all populated fields (names, the six-axis parts, related names, ranks, example units, status/change history) plus Link to loinc.org. This is tier-2 of the search→detail workflow: triage with search_loincs, then get_loinc the code you want. Null/empty fields are dropped, so the field set adapts to the term type. Content that lives only on the loinc.org page (part LP hierarchy, language variants, curated part descriptions) is not in this record — follow Link for it.