Prototype KG‑aware adaptation of the BioPortal interface. Graph pages generated from live KG‑Registry metadata; tool links go to the live BioPortal.
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OCRE

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Ontology of Clinical Research

KGXBioPortal ontologyvRevision 315
Visibility: Public

A KGX transformation of the BioPortal ontology Ontology of Clinical Research (OCRE), produced by KG‑Bioportal. Nodes are ontology classes; edges are the relations between them. The base graph is the ontology on its own, imports stripped; the full graph, where built, has the import closure merged in.

Base graph at a glance

444
Nodes
638
Edges
Revision 315
Version
2026-09-14
Transformed

Products & downloads

Base
KGX base graph (imports stripped)
OCRE.tar.gz
444 nodes · 638 edges
Full graph not built (unresolvable_imports)

At least one of this ontology's imports could not be fetched (a dead, moved, or unreachable URL), so ROBOT could not merge the import closure. The base graph is unaffected.

The base graph contains OCRE_nodes.tsv and OCRE_edges.tsv. Releases are incremental, so each link points at whichever release most recently rebuilt this ontology.

Imports 3

What this ontology pulls in through owl:imports. An import that is itself a BioPortal ontology links to its page here; a module of one links to the ontology it belongs to; anything else links out, or is named by its namespace when it is not a web address. The base graph leaves all of these out; the full graph, where built, has them merged in.

Biolink categories 2 categories across 444 nodes

NamedThing443
InformationContentEntity1

An item carrying more than one category is counted under each, so these counts can add up to more than the total.

How they were assigned 1 of 444 nodes (0.2%)

1is a seed term whose Biolink class is not in doubt

Biolink categories 1 category across 638 edges

Association638

An item carrying more than one category is counted under each, so these counts can add up to more than the total.