rdfssubPropertyOf
The RDF Schema construct rdfs:subPropertyOf is a fundamental part of the RDF (Resource Description Framework) vocabulary, used for defining relationships between properties. It is a property itself, declared within the RDF Schema namespace (http://www.w3.org/2000/01/rdf-schema#). When an assertion is made that property P1 is an rdfs:subPropertyOf property P2, it signifies that any resource related by P1 is also implicitly related by P2. This creates a hierarchical or transitive relationship, allowing for more expressive and inferable knowledge representation.
For example, if we define "hasParent" as an rdfs:subPropertyOf "hasAncestor", then stating that "Alice hasParent Bob"