ex

http://example.org/ link to namespace URI +1+1

http://purl.org/net/ns/ex# link to namespace URI +1+1

http://example.com/ link to namespace URI +1+1

http://cuixiyan.com/ link to namespace URI +1+1

http://example.org/ldid# link to namespace URI +1+1

http://www.semanticweb.org/pougs/ontologies/2020/10/covidFrance_IF28# link to namespace URI +1+1

Add alternative URI
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