Question 1

What types of datasets are indexed on OCRA?

Accepted Answer

OCRA indexes de-identified clinical, genomic, imaging, and patient-reported datasets contributed by research studies and the Living Lab registry, each linked to its source study and related papers.

Question 2

How are datasets made explorable in the browser?

Accepted Answer

Datasets are encoded as ZSTD-compressed Parquet files and loaded via DuckDB-WASM in the browser over HTTP Range requests, enabling interactive visualizations without server round-trips.

Question 3

Can I request access to a restricted dataset?

Accepted Answer

Yes. Restricted datasets require application through the Discovery Lab Governance Committee. Approved researchers receive access credentials for research-use-only analysis.