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.

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

has narrower
comment: Narrower concepts are typically rendered as children in a concept hierarchy (tree).
sub property of: Transitive
definition: Relates a concept to a concept that is more specific in meaning.

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.

Variable
type: Class

has Matrix
comment: A Variable might have an Entity in which the ObjectOfInterest is contained.
sub property of: hasContextObject

has ObjectOfInterest
comment: A Variable has an Entity whose Property is observed.

has Property
comment: A Variable has a Property that characterizes an Entity.

Concentration
type: Concept
type: Property

Dissolved sulfate mass concentration in groundwater
type: Concept
type: Variable
broader: Groundwater sulfate concentration

Groundwater major ions
type: Concept
type: CategoryOfVariable
narrower: Groundwater sulfate concentration

Sulfate
type: Concept
type: Entity

Groundwater other mineral elements
type: Concept
type: CategoryOfVariable
narrower: Groundwater sulfate concentration

Groundwater
type: Concept
type: Entity

Groundwater sulfate concentration
type: Concept
type: Variable
description: Scientific variable observing groundwater sulfate concentration
broader: Groundwater major ions
broader: Groundwater other mineral elements
is in scheme: ozcar-theia
narrower: Dissolved sulfate mass concentration in groundwater
has Matrix: Groundwater
has ObjectOfInterest: Sulfate
has Property: Concentration
Simplified label: Groundwater sulfate concentration

Simplified label
comment: For Theia OZCAR information system purpose. This label is used to enhance discoverability on the information system.