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[bioontology-support] CUI meaning

Manuel Salvadores Olaizola manuelso at
Wed Nov 12 08:51:44 PST 2014

Hi Erick,

CUI is a property to record equivalence between two terms. If two terms have the same CUI value then they are equivalent. CUIs are mostly defined in UMLS ontologies but can be also found in other ontologies that map to UMLS. If the ontology you are looking at is not UMLS you might not see any values for this property.

More detailed information here:


----- Original Message -----
From: "Erick Antezana" <erick.antezana at>
To: "support at Support" <support at>
Sent: Wednesday, November 12, 2014 12:58:48 AM
Subject: [bioontology-support] CUI meaning


What does the CUI field header mean in the CSV files ? 


Class ID,Preferred Label,Synonyms,Definitions,Obsolete,CUI,Semantic Types,Parents 


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