Research prototype: open-access corpus samples for demonstration; not a live BMJ product or clinical decision-support service.
Live open-content catalogue
Five years of research at two levels of evidence.
Explore real BMJ open-access full text as whole-document evidence for breadth and canonical passage evidence for precise retrieval, citation and provenance.
10,374Open-access articles
40Canonical evidence units
9Completed ingestion jobs
30Named journals
23Discoverable topics
Evidence resolution
Breadth when speed matters. Precision when the passage matters.
Each ingestion generation makes its evidence contract explicit. That lets a client distinguish a one-unit article from a high-resolution article before it retrieves or cites anything.
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Passage-level evidence
Example articles — paragraph evidence
Stable, section-aware evidence units are materialised before indexing, giving each passage its own address and locator.
Articles
9
Evidence units
40
Units / article
4.4
Coverage
2025–2026
Generationsample-paragraph-v1
Across ingestion jobs
Six real articles. Six real evidence addresses.
The selection takes the earliest and latest completed job from each populated generation, so it continues to reflect the live corpus rather than a hand-picked fixture.
Passage-level10 evidence units
BMJ Open Diabetes Research & Care · 5 Sept 2025
TLR5 influences the development of type 1 diabetes
DiabetesEpidemiologyInfectious diseasesWomen’s health
Passage 21,851 characters
TLR5 influences the development of type 1 diabetes flagellin.2 In 2011, we found that TLR5 is the only TLR molecule that is upregulated on beta cells following glucose stimulation.3 Initially, the purpose of this upregulation was unclear, but it was hypothesized to be a defense mechanism for beta cells, which are more vulnerable when being active.4 It has been shown that high TLR5 boosts the innate immune system and granulocyte activity.5 TLR5 expression may inhibit T cells, often through induction of regulatory T…
Looking inside the primary tumour: what drives immunotherapy response in renal cell carcinoma?
Cancer and oncologyCancer immunotherapyKidney diseaseMedicines and therapeutics
Passage 21,892 characters
Looking inside the primary tumour: what drives immunotherapy response in renal cell carcinoma? feature across multiple tumour types and this study adds further support to their relevance in RCC.Equally interesting is what the investigators observed after treatment. Responding tumours showed a reduction in many immune-related transcriptional programmes, whereas non-responding tumours demonstrated increased inflammatory signalling and enrichment of exhaustion-associated pathways. The observation may seem…
Journal, publication date and controlled topic assignments live in the canonical catalogue, independently of the replaceable search index.
Articles by journal
neurintsurg10,032
BMJ Open308
BMJ Medicine3
BMJ Oncology3
Most represented topics
Epidemiology5 articles
Diabetes4 articles
Cancer and oncology3 articles
Diagnostics and biomarkers3 articles
Medicines and therapeutics3 articles
Cancer immunotherapy2 articles
Infectious diseases2 articles
Kidney disease2 articles
Ageing and older people1 articles
Cardiovascular disease1 articles
Child and adolescent health1 articles
Clinical trials1 articles
Supported query patterns
Questions this proof of concept can ground.
These examples use topics and dates present in the live catalogue. Authenticated clients can combine semantic retrieval with governed corpus scope, filters and stable citations.
01
Evidence discovery
“What does the BMJ open literature report about health inequalities and diabetes?”
hybrid retrievaltopic expansionranked previews
POST /v1/search
02
Change over time
“How did reporting on mental health outcomes change between 2009 and 2026?”
publication windowrolling answercitations
POST /v1/rolling-answers
03
Journal + topic
“Find BMJ Oncology evidence about diagnostics and biomarkers, ordered by relevance.”
journaltopicdate
POST /v1/search
04
Methods intersection
“Find clinical trials that also discuss cancer immunotherapy.”
multiple topicsarticle metadatabounded preview
POST /v1/search
05
Citation-ready passages
“Return passage-level evidence about diabetes, with article, section and stable evidence identifiers.”
paragraph generationsection locatorprovenance
POST /v1/search + GET /v1/chunks/:id
06
Corpus mapping
“Which journals and publication years cover cardiovascular disease?”
cataloguejournal facetsdate coverage
GET /v1/documents
Read the evidence contract
What the two resolutions mean in practice.
Both are useful, but they make different promises. The gateway exposes that distinction rather than allowing it to disappear inside a search result.
Passage-level: citation precision
Each paragraph has a stable evidence ID, section locator, content hash and bounded source object. A result can point to the exact unit used for retrieval or answer grounding.
Document-level: corpus breadth
One evidence ID represents the full article. Managed search chunking can still find relevant text, but the canonical gateway citation resolves to the article-level unit rather than a stable paragraph.