in RDF serializations a slot with range of uri is treated as a literal or type xsd:anyURI unless it is an identifier or a reference to an identifier, in which case it is translated directly to a node
Notes
If you are authoring schemas in LinkML YAML, the type is referenced with the lower case "uri".
Identifier and Mapping Information
Schema Source
from schema: https://example.org/pragmatic-bim-data-contract