type
comment: The subject is an instance of a class.

Concept
type: Class
label: SKOS Concept

has broader
comment: Broader concepts are typically rendered as parents in a concept hierarchy (tree).
sub property of: Transitive
definition: Relates a concept to a concept that is more general in meaning.

definition
sub property of: note
definition: A statement or formal explanation of the meaning of a concept.

is in scheme
definition: Relates a resource (for example a concept) to a concept scheme in which it is included.

preferred label
comment: A resource has no more than one value of skos:prefLabel per language tag, and no more than one value of skos:prefLabel without language tag.
comment: The range of skos:prefLabel is the class of RDF plain literals.
comment: skos:prefLabel, skos:altLabel and skos:hiddenLabel are pairwise disjoint properties.
sub property of: label
definition: The preferred lexical label for a resource, in a given language.

has related
comment: skos:related is disjoint with skos:broaderTransitive
sub property of: semanticRelation
definition: Relates a concept to a concept with which there is an associative semantic relationship.

Entity
type: Class

Oxygen-17
type: Concept
type: Entity
broader: Oxygen
definition: The stable isotope of oxygen with relative atomic mass 16.999131. The least abundant (0.038 atom percent) isotope of naturally occurring oxygen.
is in scheme: ozcar-theia
related: Oxygen-18 and oxygen-17 isotope ratio

Oxygen
type: Concept
type: Entity
narrower: Oxygen-17

Oxygen-18 and oxygen-17 isotope ratio
type: Concept
type: Property
related: Oxygen-17

The stable isotope of oxygen with relative atomic mass 16.999131. The least abundant (0.038 atom percent) isotope of naturally occurring oxygen.
source: https://www.ebi.ac.uk/chebi/searchId.do