<rdf:RDF
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns="https://w3id.org/def/saref4envi#"
    xmlns:owl="http://www.w3.org/2002/07/owl#"
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:dcterms="http://purl.org/dc/terms/"
    xmlns:time="http://www.w3.org/2006/time#"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
    xmlns:vann="http://purl.org/vocab/vann/"
    xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
    xmlns:geo="http://www.w3.org/2003/01/geo/wgs84_pos#"
    xmlns:saref="https://w3id.org/saref#" > 
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#FrequencyMeasurement">
    <rdfs:label xml:lang="en">Frequency measurement</rdfs:label>
    <rdfs:comment xml:lang="en">Represents the measured value made over a frequency property. It is also linked to the frequency unit of measure in which the value is expressed and the timestamp of the measurement.</rdfs:comment>
    <rdfs:subClassOf rdf:nodeID="A0"/>
    <rdfs:subClassOf rdf:nodeID="A1"/>
    <rdfs:subClassOf rdf:resource="https://w3id.org/saref#Measurement"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A2">
    <owl:allValuesFrom rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
    <owl:onProperty rdf:resource="https://w3id.org/saref#hasManufacturer"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#HeightMeasurement">
    <rdfs:label xml:lang="en">Height measurement</rdfs:label>
    <rdfs:comment xml:lang="en">Represents the measured value made over a height property. It is also linked to the height unit of measure in which the value is expressed and the timestamp of the measurement.</rdfs:comment>
    <rdfs:subClassOf rdf:nodeID="A3"/>
    <rdfs:subClassOf rdf:nodeID="A4"/>
    <rdfs:subClassOf rdf:resource="https://w3id.org/saref#Measurement"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
  </rdf:Description>
  <rdf:Description rdf:about="http://www.wurvoc.org/vocabularies/om-1.8/millimetre">
    <rdfs:label xml:lang="en">Milimetre</rdfs:label>
    <rdf:type rdf:resource="https://w3id.org/def/saref4envi#LengthUnit"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A5">
    <owl:allValuesFrom rdf:resource="https://w3id.org/def/saref4envi#Light"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#projectsLight"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/saref#hasValue">
    <rdfs:label xml:lang="en">has value</rdfs:label>
    <rdfs:isDefinedBy rdf:resource="https://w3id.org/saref#"/>
    <rdfs:comment xml:lang="en">A relationship defining the value of a certain property, e.g., energy or power</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#DatatypeProperty"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A6">
    <owl:allValuesFrom rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
    <owl:onProperty rdf:resource="https://w3id.org/saref#hasName"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="http://www.wurvoc.org/vocabularies/om-1.8/centimetre">
    <rdfs:label xml:lang="en">Centimetre</rdfs:label>
    <rdf:type rdf:resource="https://w3id.org/def/saref4envi#LengthUnit"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#hasCreationDate">
    <rdfs:label xml:lang="en">has creation date</rdfs:label>
    <rdfs:comment xml:lang="en">A relationship defining the creation date of an entity (e.g., a digital representation).</rdfs:comment>
    <rdfs:range rdf:resource="http://www.w3.org/2001/XMLSchema#dateTime"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#FunctionalProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#DatatypeProperty"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#LightProperty">
    <rdfs:label xml:lang="en">Light property</rdfs:label>
    <rdfs:comment xml:lang="en">An aspect of light that can be observable by a sensor.</rdfs:comment>
    <rdfs:subClassOf rdf:resource="https://w3id.org/saref#Property"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A7">
    <owl:allValuesFrom rdf:resource="https://w3id.org/def/saref4envi#Color"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#hasColor"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#Illuminance">
    <rdfs:label xml:lang="en">Illuminance</rdfs:label>
    <rdfs:comment xml:lang="en">An individual representing the light property illuminance.</rdfs:comment>
    <rdf:type rdf:resource="https://w3id.org/def/saref4envi#LightProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A8">
    <owl:allValuesFrom rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#hasVersion"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A9">
    <owl:allValuesFrom rdf:resource="http://www.w3.org/2003/01/geo/wgs84_pos#SpatialThing"/>
    <owl:onProperty rdf:resource="http://www.w3.org/2003/01/geo/wgs84_pos#location"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/saref#relatesToProperty">
    <rdfs:label xml:lang="en">relates to property</rdfs:label>
    <rdfs:isDefinedBy>https://w3id.org/saref#</rdfs:isDefinedBy>
    <rdfs:comment xml:lang="en">A relation between a measurement and the property such measurement is about.</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/saref#Sensor">
    <rdfs:label xml:lang="en">Sensor</rdfs:label>
    <rdfs:isDefinedBy rdf:resource="https://w3id.org/saref#"/>
    <rdfs:comment xml:lang="en">A device that detects and responds to events or changes in the physical environment such as light, motion, or temperature changes.
A device that has category saref:Sensor and performs a saref:SensingFunction.</rdfs:comment>
    <rdfs:subClassOf rdf:nodeID="A10"/>
    <rdfs:subClassOf rdf:nodeID="A11"/>
    <rdfs:subClassOf rdf:resource="https://w3id.org/saref#Device"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A12">
    <owl:onDataRange rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
    <owl:maxQualifiedCardinality rdf:datatype="http://www.w3.org/2001/XMLSchema#nonNegativeInteger">1</owl:maxQualifiedCardinality>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#hasRevisionNumber"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/saref#UnitOfMeasure">
    <rdfs:label xml:lang="en">Unit of measure</rdfs:label>
    <rdfs:isDefinedBy rdf:resource="https://w3id.org/saref#"/>
    <rdfs:comment xml:lang="en">The unit of measure is a standard for measurement of a quantity, such as a Property. For example,  Power is a property and Watt is a unit of power that represents a definite predetermined power: when we say 10 Watt, we actually mean 10 times the definite predetermined power called "watt". Our definition is based on the definition of unit of measure in the Ontology of units of Measure (OM). We propose here a list of some units of measure that are relevant for the purpose of the Smart Appliances ontology, but this list can be extended.</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A13">
    <owl:onClass rdf:resource="https://w3id.org/saref#Property"/>
    <owl:qualifiedCardinality rdf:datatype="http://www.w3.org/2001/XMLSchema#nonNegativeInteger">1</owl:qualifiedCardinality>
    <owl:onProperty rdf:resource="https://w3id.org/saref#relatesToProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="http://www.wurvoc.org/vocabularies/om-1.8/metre">
    <rdfs:label xml:lang="en">Metre</rdfs:label>
    <rdf:type rdf:resource="https://w3id.org/def/saref4envi#LengthUnit"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A14">
    <owl:allValuesFrom rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
    <owl:onProperty rdf:resource="https://w3id.org/saref#hasDescription"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#contains">
    <rdfs:label xml:lang="en">contains</rdfs:label>
    <rdfs:comment xml:lang="en">A relation between a physical object and the physical objects that can be contained in it.</rdfs:comment>
    <owl:inverseOf rdf:resource="https://w3id.org/def/saref4envi#isContainedIn"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A15">
    <owl:onDataRange rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
    <owl:maxQualifiedCardinality rdf:datatype="http://www.w3.org/2001/XMLSchema#nonNegativeInteger">1</owl:maxQualifiedCardinality>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#hasIdentifier"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#LightMagnitude">
    <rdfs:label xml:lang="en">Light magnitude</rdfs:label>
    <rdfs:comment xml:lang="en">An individual representing the light property light magnitude.</rdfs:comment>
    <rdf:type rdf:resource="https://w3id.org/def/saref4envi#LightProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A16">
    <owl:allValuesFrom rdf:resource="http://www.w3.org/2001/XMLSchema#boolean"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#hasShield"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A17">
    <owl:allValuesFrom rdf:resource="https://w3id.org/def/saref4envi#PhysicalObject"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#contains"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#CommunicationInterface">
    <owl:disjointWith rdf:resource="https://w3id.org/saref#UnitOfMeasure"/>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#Light"/>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#Property"/>
    <rdfs:subClassOf rdf:nodeID="A18"/>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#CommunicationProtocol"/>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#Geometry"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
    <rdfs:label xml:lang="en">Communication interface</rdfs:label>
    <rdfs:subClassOf rdf:nodeID="A8"/>
    <rdfs:comment xml:lang="en">An interface defines which primitive operations and services the lower layer makes available to the upper one, when referring to network layers. (Definition adapted from "Tanenbaum, A. S. (2003). Computer networks, 4-th edition. ed: Prentice Hall.")</rdfs:comment>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#Measurement"/>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#CompassDirection"/>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#DigitalRepresentation"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A19">
    <owl:allValuesFrom rdf:resource="https://w3id.org/saref#Property"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#affectsProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A20">
    <owl:allValuesFrom rdf:resource="https://w3id.org/def/saref4envi#CommunicationInterface"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#usesCommunicationInterface"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#isContainedIn">
    <rdfs:label xml:lang="en">is contained in</rdfs:label>
    <rdfs:comment xml:lang="en">A relation between a physical object and the physical object in which it might be contained.</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A21">
    <owl:onDataRange rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
    <owl:maxQualifiedCardinality rdf:datatype="http://www.w3.org/2001/XMLSchema#nonNegativeInteger">1</owl:maxQualifiedCardinality>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#hasVersion"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#Light">
    <owl:disjointWith rdf:resource="https://w3id.org/saref#Service"/>
    <rdfs:subClassOf rdf:nodeID="A22"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
    <rdfs:subClassOf rdf:nodeID="A23"/>
    <rdfs:subClassOf rdf:nodeID="A24"/>
    <rdfs:subClassOf rdf:nodeID="A25"/>
    <rdfs:subClassOf rdf:nodeID="A7"/>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#Property"/>
    <rdfs:subClassOf rdf:nodeID="A26"/>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#UnitOfMeasure"/>
    <rdfs:label xml:lang="en">Light</rdfs:label>
    <rdfs:comment xml:lang="en">A light source, which may be a lantern, a street light, a floodlight, a signal lamp or any other device whose primary purpose is the generation of light. (Definition taken from http://wiki.openstreetmap.org/wiki/Proposed_features/Key:light_source#Description)</rdfs:comment>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#Measurement"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#hasVersion">
    <rdfs:label xml:lang="en">has version</rdfs:label>
    <rdfs:comment xml:lang="en">A relationship defining the version  of a certain entity (e.g., a device)</rdfs:comment>
    <rdfs:range rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#FunctionalProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#DatatypeProperty"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#encapsulates">
    <rdfs:label xml:lang="en">encapsulates</rdfs:label>
    <rdfs:comment xml:lang="en">A relation between a digital representation and the physical objects it represents.</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#FunctionalProperty"/>
    <owl:inverseOf rdf:resource="https://w3id.org/def/saref4envi#hasDigitalRepresentation"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#FrequencyUnit">
    <rdfs:label xml:lang="en">Frequency unit</rdfs:label>
    <rdfs:comment xml:lang="en">Unit of measure for the quantity frequency.</rdfs:comment>
    <rdfs:subClassOf rdf:resource="https://w3id.org/saref#UnitOfMeasure"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A27">
    <owl:allValuesFrom rdf:resource="https://w3id.org/def/saref4envi#FrequencyMeasurement"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#hasFrequencyMeasurement"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="http://www.w3.org/2003/01/geo/wgs84_pos#Point">
    <rdfs:label xml:lang="en">Point</rdfs:label>
    <rdfs:isDefinedBy rdf:resource="http://www.w3.org/2003/01/geo/wgs84_pos#"/>
    <rdfs:comment xml:lang="en">A point, typically described using a coordinate system relative to Earth, such as WGS84. Uniquely identified by lat/long/alt. i.e. spaciallyIntersects(P1, P2) :- lat(P1, LAT), long(P1, LONG), alt(P1, ALT), at(P2, LAT), long(P2, LONG), alt(P2, ALT). sameThing(P1, P2) :- type(P1, Point), type(P2, Point), spaciallyIntersects(P1, P2).</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A28">
    <owl:allValuesFrom rdf:resource="http://www.w3.org/2001/XMLSchema#dateTime"/>
    <owl:onProperty rdf:resource="https://w3id.org/saref#hasTimestamp"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="http://www.wurvoc.org/vocabularies/om-1.8/decimetre">
    <rdfs:label xml:lang="en">Decimetre</rdfs:label>
    <rdf:type rdf:resource="https://w3id.org/def/saref4envi#LengthUnit"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
  </rdf:Description>
  <rdf:Description rdf:about="http://www.wurvoc.org/vocabularies/om-1.8/hectometre">
    <rdfs:label xml:lang="en">Hectometre</rdfs:label>
    <rdf:type rdf:resource="https://w3id.org/def/saref4envi#LengthUnit"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#Photometer">
    <rdfs:label xml:lang="en">Photometer</rdfs:label>
    <rdfs:comment xml:lang="en">A photometer, generally, is an instrument that measures light intensity or optical properties of solutions or surfaces.</rdfs:comment>
    <rdfs:subClassOf rdf:nodeID="A29"/>
    <rdfs:subClassOf rdf:resource="https://w3id.org/saref#Sensor"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#isAccesibleThrough">
    <rdfs:label xml:lang="en">is accesible through</rdfs:label>
    <rdfs:comment xml:lang="en">The relation between a digital representation and the service which it is accesible through.</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#FunctionalProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A1">
    <owl:hasValue rdf:resource="https://w3id.org/def/saref4envi#Frequency"/>
    <owl:onProperty rdf:resource="https://w3id.org/saref#relatesToProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="http://www.w3.org/2003/01/geo/wgs84_pos#location">
    <rdfs:label xml:lang="en">location</rdfs:label>
    <rdfs:isDefinedBy rdf:resource="http://www.w3.org/2003/01/geo/wgs84_pos#"/>
    <rdfs:comment xml:lang="en">The relation between something and the point,  or other geometrical thing in space, where it is.  For example, the realtionship between a radio tower and a Point with a given lat and long. Or a relationship between a park and its outline as a closed arc of points, or a road and its location as a arc (a sequence of points). Clearly in practice there will be limit to the accuracy of any such statement, but one would expect an accuracy appropriate for the size of the object and uses such as mapping .</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#LightAbsorption">
    <rdfs:label xml:lang="en">Light absorption</rdfs:label>
    <rdfs:comment xml:lang="en">An individual representing the light property light absorption.</rdfs:comment>
    <rdf:type rdf:resource="https://w3id.org/def/saref4envi#LightProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A30">
    <owl:onClass rdf:resource="http://www.w3.org/2006/time#TemporalUnit"/>
    <owl:qualifiedCardinality rdf:datatype="http://www.w3.org/2001/XMLSchema#nonNegativeInteger">1</owl:qualifiedCardinality>
    <owl:onProperty rdf:resource="https://w3id.org/saref#isMeasuredIn"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/saref#Service">
    <rdfs:label xml:lang="en">Service</rdfs:label>
    <rdfs:isDefinedBy rdf:resource="https://w3id.org/saref#"/>
    <rdfs:comment xml:lang="en">A service is a representation of a function to a network that makes the function discoverable, registerable, remotely controllable by other devices in the network. A service can represent one or more functions. A Service is offered by a device that wants (a certain set of) its function(s) to be discoverable, registerable, remotely controllable by other devices in the network. A Service must specify the device that is offering the service, the function(s) to be represented, and the (input and output) parameters necessary to operate the service.</rdfs:comment>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#UnitOfMeasure"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A31">
    <owl:allValuesFrom rdf:resource="https://w3id.org/def/saref4envi#System"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#isConnectedTo"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A32">
    <owl:allValuesFrom rdf:resource="https://w3id.org/def/saref4envi#PhysicalObject"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#encapsulates"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/saref#measuresProperty">
    <rdfs:label xml:lang="en">measures property</rdfs:label>
    <rdfs:isDefinedBy>https://w3id.org/saref#</rdfs:isDefinedBy>
    <rdfs:comment xml:lang="en">A relation between a sensor and the property o properties it can take measurement about.</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </rdf:Description>
  <rdf:Description rdf:about="http://www.wurvoc.org/vocabularies/om-1.8/hertz">
    <rdfs:label xml:lang="en">Hertz</rdfs:label>
    <rdf:type rdf:resource="https://w3id.org/def/saref4envi#FrequencyUnit"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A33">
    <owl:allValuesFrom rdf:resource="http://www.w3.org/2001/XMLSchema#float"/>
    <owl:onProperty rdf:resource="https://w3id.org/saref#hasValue"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#ReflectionOfLight">
    <rdfs:label xml:lang="en">Reflection of light</rdfs:label>
    <rdfs:comment xml:lang="en">An individual representing the light property reflection of light.</rdfs:comment>
    <rdf:type rdf:resource="https://w3id.org/def/saref4envi#LightProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
  </rdf:Description>
  <rdf:Description rdf:about="http://www.wurvoc.org/vocabularies/om-1.8/reciprocal_second-time">
    <rdfs:label xml:lang="en">Reciprocal second</rdfs:label>
    <rdf:type rdf:resource="https://w3id.org/def/saref4envi#FrequencyUnit"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A34">
    <owl:allValuesFrom rdf:resource="https://w3id.org/def/saref4envi#System"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#isComponentOf"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/saref#Device">
    <rdfs:label xml:lang="en">Device</rdfs:label>
    <rdfs:isDefinedBy rdf:resource="https://w3id.org/saref#"/>
    <rdfs:comment xml:lang="en">A tangible object designed to accomplish a particular task in households, common public buildings or offices. In order to accomplish this task, the device performs one or more functions. For example, a washing machine is designed to wash (task) and to accomplish this task it performs the start and stop function.</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi">
    <dc:publisher rdf:resource="http://www.oeg-upm.net/"/>
    <vann:preferredNamespacePrefix>s4envi</vann:preferredNamespacePrefix>
    <dc:title xml:lang="en">SAREF extension for environment</dc:title>
    <dc:description xml:lang="en">This ontology extends the SAREF ontology for the environment domain, specifically for the light pollution domain, including concepts like photometers, light, etc.</dc:description>
    <dcterms:creator rdf:resource="http://www.garcia-castro.com/foaf.rdf#me"/>
    <owl:versionInfo>1.0</owl:versionInfo>
    <dcterms:license rdf:resource="http://purl.org/NET/rdflicense/cc-by4.0"/>
    <vann:preferredNamespaceUri>https://w3id.org/def/saref4envi#</vann:preferredNamespaceUri>
    <dcterms:creator rdf:resource="http://purl.org/net/mpoveda"/>
    <owl:versionIRI rdf:resource="https://w3id.org/def/v1/saref4envi"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Ontology"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#PeriodMeasurement">
    <rdfs:label xml:lang="en">Period measurement</rdfs:label>
    <rdfs:comment xml:lang="en">Represents the measured value over a period property. It is also linked to the period unit of measure in which the value is expressed and the timestamp of the measurement.</rdfs:comment>
    <rdfs:subClassOf rdf:nodeID="A30"/>
    <rdfs:subClassOf rdf:nodeID="A35"/>
    <rdfs:subClassOf rdf:resource="https://w3id.org/saref#Measurement"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#hasTag">
    <rdfs:label xml:lang="en">has tag</rdfs:label>
    <rdfs:comment xml:lang="en">A relationship stating the tags that can be assigned to an entity (e.g., a digital representation).</rdfs:comment>
    <rdfs:range rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#DatatypeProperty"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#LengthUnit">
    <rdfs:label xml:lang="en">Length unit</rdfs:label>
    <rdfs:comment xml:lang="en">Unit of measure for the quantity lenght.</rdfs:comment>
    <rdfs:subClassOf rdf:resource="https://w3id.org/saref#UnitOfMeasure"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A36">
    <owl:onDataRange rdf:resource="http://www.w3.org/2001/XMLSchema#dateTime"/>
    <owl:maxQualifiedCardinality rdf:datatype="http://www.w3.org/2001/XMLSchema#nonNegativeInteger">1</owl:maxQualifiedCardinality>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#hasCreationDate"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#hasIdentifier">
    <rdfs:label xml:lang="en">has identifier</rdfs:label>
    <rdfs:comment xml:lang="en">A relationship providing the identifier of an entity (e.g., digital representation)</rdfs:comment>
    <rdfs:range rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#DatatypeProperty"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#ScatteringOfLight">
    <rdfs:label xml:lang="en">Scattering of light</rdfs:label>
    <rdfs:comment xml:lang="en">An individual representing the light property scattering of light.</rdfs:comment>
    <rdf:type rdf:resource="https://w3id.org/def/saref4envi#LightProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A0">
    <owl:onClass rdf:resource="https://w3id.org/def/saref4envi#FrequencyUnit"/>
    <owl:qualifiedCardinality rdf:datatype="http://www.w3.org/2001/XMLSchema#nonNegativeInteger">1</owl:qualifiedCardinality>
    <owl:onProperty rdf:resource="https://w3id.org/saref#isMeasuredIn"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/saref#hasDescription">
    <rdfs:label xml:lang="en">has description</rdfs:label>
    <rdfs:isDefinedBy rdf:resource="https://w3id.org/saref#"/>
    <rdfs:comment xml:lang="en">A relationship providing a description of an entity (e.g., device)</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#DatatypeProperty"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A29">
    <owl:someValuesFrom rdf:resource="https://w3id.org/def/saref4envi#LightProperty"/>
    <owl:onProperty rdf:resource="https://w3id.org/saref#measuresProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#isConnectedTo">
    <rdfs:label xml:lang="en">is connected to</rdfs:label>
    <rdfs:comment xml:lang="en">A relation between a system and the system to which it is connected.</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#SymmetricProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A23">
    <owl:allValuesFrom rdf:resource="https://w3id.org/def/saref4envi#Geometry"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#hasGeometry"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#Phosphorescence">
    <rdfs:label xml:lang="en">Phosphorescence</rdfs:label>
    <rdfs:comment xml:lang="en">An individual representing the light property phosphorescence.</rdfs:comment>
    <rdf:type rdf:resource="https://w3id.org/def/saref4envi#LightProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/saref#makesMeasurement">
    <rdfs:label xml:lang="en">makes measurement</rdfs:label>
    <rdfs:isDefinedBy>https://w3id.org/saref#</rdfs:isDefinedBy>
    <rdfs:comment xml:lang="en">A relation between a sensor and the measurements it makes. Such measurement will link together the valur of the measurement, its unit of measure and the property to which it relates.</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#usesCommunicationProtocol">
    <rdfs:label xml:lang="en">uses communication protocol</rdfs:label>
    <rdfs:comment xml:lang="en">A relation between a system and the communication protocol it uses.</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#hasRevisionNumber">
    <rdfs:label xml:lang="en">has revision number</rdfs:label>
    <rdfs:comment xml:lang="en">A relationship defining the revision number of a certain entity (e.g., a device)</rdfs:comment>
    <rdfs:range rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#DatatypeProperty"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A37">
    <owl:onDataRange rdf:resource="http://www.w3.org/2001/XMLSchema#float"/>
    <owl:qualifiedCardinality rdf:datatype="http://www.w3.org/2001/XMLSchema#nonNegativeInteger">1</owl:qualifiedCardinality>
    <owl:onProperty rdf:resource="https://w3id.org/saref#hasValue"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/saref#hasName">
    <rdfs:label xml:lang="en">has name</rdfs:label>
    <rdfs:isDefinedBy rdf:resource="https://w3id.org/saref#"/>
    <rdfs:comment xml:lang="en">A relationship providing the name of an entity (e.g., device)</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#DatatypeProperty"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#hasTransmissionPeriod">
    <rdfs:label xml:lang="en">has transmission period</rdfs:label>
    <rdfs:comment xml:lang="en">The relation between a device and the period in which it transmit information.</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#LightPoint">
    <rdfs:label xml:lang="en">Light point</rdfs:label>
    <rdfs:comment xml:lang="en">An spatial point from where a light is projected. It might belong to a lamppost.</rdfs:comment>
    <rdfs:subClassOf rdf:nodeID="A5"/>
    <rdfs:subClassOf rdf:nodeID="A38"/>
    <rdfs:subClassOf rdf:resource="http://www.w3.org/2003/01/geo/wgs84_pos#Point"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A39">
    <owl:onClass rdf:resource="https://w3id.org/saref#UnitOfMeasure"/>
    <owl:qualifiedCardinality rdf:datatype="http://www.w3.org/2001/XMLSchema#nonNegativeInteger">1</owl:qualifiedCardinality>
    <owl:onProperty rdf:resource="https://w3id.org/saref#isMeasuredIn"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#usesCommunicationInterface">
    <rdfs:label xml:lang="en">uses communication interface</rdfs:label>
    <rdfs:comment xml:lang="en">A relation between a system and the communication interface it uses.</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/saref#hasManufacturer">
    <rdfs:label xml:lang="en">has manufacturer</rdfs:label>
    <rdfs:isDefinedBy rdf:resource="https://w3id.org/saref#"/>
    <rdfs:comment xml:lang="en">A relationship identifying the manufacturer of an entity (e.g., device)</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#DatatypeProperty"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#PhysicalObject">
    <rdfs:label xml:lang="en">Physical object</rdfs:label>
    <rdfs:comment xml:lang="en">Any Object that has a proper space region.  (Definition extracted from DUL ontology)</rdfs:comment>
    <rdfs:subClassOf rdf:nodeID="A40"/>
    <rdfs:subClassOf rdf:nodeID="A41"/>
    <rdfs:subClassOf rdf:nodeID="A42"/>
    <rdfs:subClassOf rdf:nodeID="A17"/>
    <rdfs:subClassOf rdf:nodeID="A9"/>
    <rdfs:subClassOf rdf:resource="http://www.w3.org/2003/01/geo/wgs84_pos#SpatialThing"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A3">
    <owl:onClass rdf:resource="https://w3id.org/def/saref4envi#LengthUnit"/>
    <owl:qualifiedCardinality rdf:datatype="http://www.w3.org/2001/XMLSchema#nonNegativeInteger">1</owl:qualifiedCardinality>
    <owl:onProperty rdf:resource="https://w3id.org/saref#isMeasuredIn"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#isComponentOf">
    <rdfs:label xml:lang="en">is component of</rdfs:label>
    <rdfs:comment xml:lang="en">A relation between a system and the system it belongs to as a component.</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#TransitiveProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A43">
    <owl:allValuesFrom rdf:resource="https://w3id.org/def/saref4envi#PeriodMeasurement"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#hasTransmissionPeriod"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#CommunicationProtocol">
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#CompassDirection"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#Service"/>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#Property"/>
    <rdfs:label xml:lang="en">Communication protocol</rdfs:label>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#Measurement"/>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#DigitalRepresentation"/>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#Geometry"/>
    <rdfs:comment xml:lang="en">A protocol is an agreement between the communicating parties on how communication is to proceed. (Definition taken from "Tanenbaum, A. S. (2003). Computer networks, 4-th edition. ed: Prentice Hall.")</rdfs:comment>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#UnitOfMeasure"/>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#Light"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/saref#Measurement">
    <rdfs:subClassOf rdf:nodeID="A28"/>
    <rdfs:subClassOf rdf:nodeID="A39"/>
    <rdfs:comment xml:lang="en">Represents the measured value made over a property. It is also linked to the unit of measure in which the value is expressed and the timestamp of the measurement.</rdfs:comment>
    <rdfs:subClassOf rdf:nodeID="A37"/>
    <rdfs:subClassOf rdf:nodeID="A44"/>
    <rdfs:subClassOf rdf:nodeID="A45"/>
    <rdfs:subClassOf rdf:nodeID="A13"/>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#Service"/>
    <rdfs:label xml:lang="en">Measurement</rdfs:label>
    <rdfs:subClassOf rdf:nodeID="A33"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#Property"/>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#UnitOfMeasure"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#Actuator">
    <rdfs:label xml:lang="en">Actuator</rdfs:label>
    <rdfs:comment xml:lang="en">Device that can act over at least one property.</rdfs:comment>
    <rdfs:subClassOf rdf:nodeID="A19"/>
    <rdfs:subClassOf rdf:resource="https://w3id.org/def/saref4envi#Device"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#Height">
    <rdfs:label xml:lang="en">Height</rdfs:label>
    <rdfs:comment xml:lang="en">An individual representing the property height.</rdfs:comment>
    <rdf:type rdf:resource="https://w3id.org/saref#Property"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#Fluorescence">
    <rdfs:label xml:lang="en">Fluorescence</rdfs:label>
    <rdfs:comment xml:lang="en">An individual representing the light property fluorescence.</rdfs:comment>
    <rdf:type rdf:resource="https://w3id.org/def/saref4envi#LightProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#Luminiscence">
    <rdfs:label xml:lang="en">Luminiscence</rdfs:label>
    <rdfs:comment xml:lang="en">An individual representing the light property luminiscence.</rdfs:comment>
    <rdf:type rdf:resource="https://w3id.org/def/saref4envi#LightProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A46">
    <owl:allValuesFrom rdf:resource="https://w3id.org/saref#Service"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#isAccesibleThrough"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A22">
    <owl:allValuesFrom rdf:resource="https://w3id.org/def/saref4envi#HeightMeasurement"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#isProjectedFromHeight"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#hasFlash">
    <rdfs:label xml:lang="en">has flash</rdfs:label>
    <rdfs:comment xml:lang="en">A relationship stating whether a light has flash.</rdfs:comment>
    <rdfs:range rdf:resource="http://www.w3.org/2001/XMLSchema#boolean"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#FunctionalProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#DatatypeProperty"/>
  </rdf:Description>
  <rdf:Description rdf:about="http://www.wurvoc.org/vocabularies/om-1.8/decametre">
    <rdfs:label xml:lang="en">Decametre</rdfs:label>
    <rdf:type rdf:resource="https://w3id.org/def/saref4envi#LengthUnit"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#Geometry">
    <rdfs:label xml:lang="en">Geometry</rdfs:label>
    <rdfs:comment xml:lang="en">Represents the shape of the light emission. It might be instantiated by individuals like "spherical", "cylindrical", etc. even though it is open to more comples representation of geometries using other vocabularies.</rdfs:comment>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#UnitOfMeasure"/>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#Service"/>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#Property"/>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#Measurement"/>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#Light"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#hasShield">
    <rdfs:label xml:lang="en">has shield</rdfs:label>
    <rdfs:comment xml:lang="en">A relationship stating whether a lamppost has a shield.</rdfs:comment>
    <rdfs:range rdf:resource="http://www.w3.org/2001/XMLSchema#boolean"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#FunctionalProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#DatatypeProperty"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#isProjectedInDirection">
    <rdfs:label xml:lang="en">is projected in direction</rdfs:label>
    <rdfs:comment xml:lang="en">A relation between a light and the direction in which it is projected.</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A47">
    <owl:allValuesFrom rdf:resource="https://w3id.org/def/saref4envi#System"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#hasComponent"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A11">
    <owl:allValuesFrom rdf:resource="https://w3id.org/saref#Measurement"/>
    <owl:onProperty rdf:resource="https://w3id.org/saref#makesMeasurement"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#projectsLight">
    <rdfs:label xml:lang="en">projects light</rdfs:label>
    <rdfs:comment xml:lang="en">A relation between a lamppost or a light point and the light (or lights) they might project.</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#Device">
    <rdfs:subClassOf rdf:nodeID="A27"/>
    <rdfs:subClassOf rdf:resource="https://w3id.org/def/saref4envi#System"/>
    <rdfs:subClassOf rdf:nodeID="A2"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
    <rdfs:subClassOf rdf:resource="https://w3id.org/saref#Device"/>
    <rdfs:subClassOf rdf:nodeID="A48"/>
    <rdfs:comment xml:lang="en">A thing made or adapted for a particular purpose, especially a piece of mechanical or electronic equipment. For example ‘a measuring device’ (definition taken from https://en.oxforddictionaries.com/definition/device). In this ontology it refers to the devices for environmental purposes.</rdfs:comment>
    <rdfs:subClassOf rdf:nodeID="A49"/>
    <rdfs:subClassOf rdf:nodeID="A12"/>
    <rdfs:label xml:lang="en">Device</rdfs:label>
    <rdfs:subClassOf rdf:nodeID="A43"/>
    <rdfs:subClassOf rdf:nodeID="A50"/>
    <rdfs:subClassOf rdf:nodeID="A21"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#hasGeometry">
    <rdfs:label xml:lang="en">has geometry</rdfs:label>
    <rdfs:comment xml:lang="en">A relation between a light emitted and the shape it is projected in.</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/saref#hasTimestamp">
    <rdfs:label xml:lang="en">has timestamp</rdfs:label>
    <rdfs:isDefinedBy>https://w3id.org/saref#</rdfs:isDefinedBy>
    <rdfs:comment xml:lang="en">A relationship stating the timestamp of an entity (e.g. a measurement).</rdfs:comment>
    <rdfs:range rdf:resource="http://www.w3.org/2001/XMLSchema#dateTime"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#FunctionalProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#DatatypeProperty"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#hasLightPoint">
    <rdfs:label xml:lang="en">has light point</rdfs:label>
    <rdfs:comment xml:lang="en">A relation between a lamppost and its light points</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#affectsProperty">
    <rdfs:label xml:lang="en">affects property</rdfs:label>
    <rdfs:comment xml:lang="en">A relation between an actuator with the property or properties it can act on</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#TESS">
    <rdfs:label xml:lang="en">TESS (Telescope Encoder and Sky Sensor)</rdfs:label>
    <rdfs:comment xml:lang="en">The Telescope Encoder and Sky Sensor (TESS) is a Sky Brightness and Cloud detector developed as a device for a remote observatory. A TESS can observe the light magnitude and other properties as ambient temperature and sky temperature.</rdfs:comment>
    <rdfs:subClassOf rdf:resource="https://w3id.org/def/saref4envi#Photometer"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A4">
    <owl:hasValue rdf:resource="https://w3id.org/def/saref4envi#Height"/>
    <owl:onProperty rdf:resource="https://w3id.org/saref#relatesToProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A48">
    <owl:allValuesFrom rdf:resource="https://w3id.org/def/saref4envi#PhysicalObject"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#isContainedIn"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A35">
    <owl:hasValue rdf:resource="https://w3id.org/def/saref4envi#Period"/>
    <owl:onProperty rdf:resource="https://w3id.org/saref#relatesToProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#hasComponent">
    <rdfs:label xml:lang="en">has component</rdfs:label>
    <rdfs:comment xml:lang="en">A relation between a system and the system in which it might be decomposed.</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#TransitiveProperty"/>
    <owl:inverseOf rdf:resource="https://w3id.org/def/saref4envi#isComponentOf"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#hasProjectionAngle">
    <rdfs:label xml:lang="en">has projection angle</rdfs:label>
    <rdfs:comment xml:lang="en">A relationship defining the projection angle of an entity (e.g., a light).</rdfs:comment>
    <rdfs:range rdf:resource="http://www.w3.org/2001/XMLSchema#float"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#FunctionalProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#DatatypeProperty"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#System">
    <rdfs:label xml:lang="en">System</rdfs:label>
    <rdfs:comment xml:lang="en">A group of related hardware units or programs or both, especially when dedicated to a single application. (Definition taken from https://en.oxforddictionaries.com/definition/system)</rdfs:comment>
    <rdfs:subClassOf rdf:nodeID="A51"/>
    <rdfs:subClassOf rdf:nodeID="A20"/>
    <rdfs:subClassOf rdf:nodeID="A31"/>
    <rdfs:subClassOf rdf:nodeID="A34"/>
    <rdfs:subClassOf rdf:nodeID="A47"/>
    <rdfs:subClassOf rdf:resource="https://w3id.org/def/saref4envi#PhysicalObject"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#Lamppost">
    <rdfs:label xml:lang="en">Lamppost</rdfs:label>
    <rdfs:comment xml:lang="en">A tall pole with a light at the top.</rdfs:comment>
    <rdfs:subClassOf rdf:nodeID="A16"/>
    <rdfs:subClassOf rdf:nodeID="A52"/>
    <rdfs:subClassOf rdf:nodeID="A53"/>
    <rdfs:subClassOf rdf:resource="https://w3id.org/def/saref4envi#Device"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A26">
    <owl:allValuesFrom rdf:resource="https://w3id.org/def/saref4envi#CompassDirection"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#isProjectedInDirection"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A40">
    <owl:allValuesFrom rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
    <owl:onProperty rdf:resource="https://w3id.org/saref#hasDescription"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A54">
    <owl:allValuesFrom rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#hasIdentifier"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A24">
    <owl:allValuesFrom rdf:resource="http://www.w3.org/2001/XMLSchema#float"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#hasProjectionAngle"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A10">
    <owl:allValuesFrom rdf:resource="https://w3id.org/saref#Property"/>
    <owl:onProperty rdf:resource="https://w3id.org/saref#measuresProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#DigitalRepresentation">
    <rdfs:subClassOf rdf:nodeID="A14"/>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#Light"/>
    <rdfs:subClassOf rdf:nodeID="A55"/>
    <rdfs:label xml:lang="en">Digital representation</rdfs:label>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#UnitOfMeasure"/>
    <rdfs:subClassOf rdf:nodeID="A54"/>
    <rdfs:subClassOf rdf:nodeID="A56"/>
    <rdfs:comment xml:lang="en">A digital representation encapsulates a physical object accessible via Web services</rdfs:comment>
    <rdfs:subClassOf rdf:nodeID="A15"/>
    <rdfs:subClassOf rdf:nodeID="A36"/>
    <rdfs:subClassOf rdf:nodeID="A46"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#Geometry"/>
    <rdfs:subClassOf rdf:nodeID="A6"/>
    <rdfs:subClassOf rdf:nodeID="A32"/>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#Measurement"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A51">
    <owl:allValuesFrom rdf:resource="https://w3id.org/def/saref4envi#CommunicationProtocol"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#usesCommunicationProtocol"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="http://www.wurvoc.org/vocabularies/om-1.8/kilometre">
    <rdfs:label xml:lang="en">Kilometre</rdfs:label>
    <rdf:type rdf:resource="https://w3id.org/def/saref4envi#LengthUnit"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#hasDigitalRepresentation">
    <rdfs:label xml:lang="en">has digital representation</rdfs:label>
    <rdfs:comment xml:lang="en">A relation between a physical object and the digital representation in which it is encapsulated.</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#InverseFunctionalProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A52">
    <owl:allValuesFrom rdf:resource="https://w3id.org/def/saref4envi#Light"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#projectsLight"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="http://www.wurvoc.org/vocabularies/om-1.8/reciprocal_day">
    <rdfs:label xml:lang="en">Reciprocal day</rdfs:label>
    <rdf:type rdf:resource="https://w3id.org/def/saref4envi#FrequencyUnit"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A49">
    <owl:allValuesFrom rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#hasRevisionNumber"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A41">
    <owl:allValuesFrom rdf:resource="https://w3id.org/def/saref4envi#PhysicalObject"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#isContainedIn"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A25">
    <owl:allValuesFrom rdf:resource="http://www.w3.org/2001/XMLSchema#boolean"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#hasFlash"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A55">
    <owl:allValuesFrom rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#hasTag"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A38">
    <owl:allValuesFrom rdf:resource="http://www.w3.org/2003/01/geo/wgs84_pos#SpatialThing"/>
    <owl:onProperty rdf:resource="http://www.w3.org/2003/01/geo/wgs84_pos#location"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#CompassDirection">
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#Light"/>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#Measurement"/>
    <rdfs:label xml:lang="en">Compass direction</rdfs:label>
    <rdfs:comment xml:lang="en">The four cardinal directions or cardinal points are the directions of north, east, south, and west, commonly denoted by their initials: N, E, S, W. East and west are at right angles to north and south, with east being in the clockwise direction of rotation from north and west being directly opposite east. Intermediate points between the four cardinal directions form the points of the compass. (definition taken from https://en.wikipedia.org/wiki/Cardinal_direction)</rdfs:comment>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#DigitalRepresentation"/>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#Service"/>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#Geometry"/>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#UnitOfMeasure"/>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#Property"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#Color">
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#UnitOfMeasure"/>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#Light"/>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#CompassDirection"/>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#CommunicationProtocol"/>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#CommunicationInterface"/>
    <rdfs:label xml:lang="en">Color</rdfs:label>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#DigitalRepresentation"/>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#Geometry"/>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#Service"/>
    <rdfs:comment xml:lang="en">Color of the emitted light. It might be indicated by named colors or using other type of color values like hexadecimal for RGB, color temperature, etc.</rdfs:comment>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A56">
    <owl:allValuesFrom rdf:resource="http://www.w3.org/2001/XMLSchema#dateTime"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#hasCreationDate"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="http://www.wurvoc.org/vocabularies/om-1.8/reciprocal_year">
    <rdfs:label xml:lang="en">Reciprocal year</rdfs:label>
    <rdf:type rdf:resource="https://w3id.org/def/saref4envi#FrequencyUnit"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A42">
    <owl:allValuesFrom rdf:resource="https://w3id.org/def/saref4envi#DigitalRepresentation"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#hasDigitalRepresentation"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A18">
    <owl:onDataRange rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
    <owl:maxQualifiedCardinality rdf:datatype="http://www.w3.org/2001/XMLSchema#nonNegativeInteger">1</owl:maxQualifiedCardinality>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#hasVersion"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#Period">
    <rdfs:label xml:lang="en">Period</rdfs:label>
    <rdfs:comment xml:lang="en">An individual representing the property period.</rdfs:comment>
    <rdf:type rdf:resource="https://w3id.org/saref#Property"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#Frequency">
    <rdfs:label xml:lang="en">Frequency</rdfs:label>
    <rdfs:comment xml:lang="en">An individual representing the property frequency.</rdfs:comment>
    <rdf:type rdf:resource="https://w3id.org/saref#Property"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
  </rdf:Description>
  <rdf:Description rdf:about="http://www.w3.org/2003/01/geo/wgs84_pos#SpatialThing">
    <rdfs:comment xml:lang="en">Anything with spatial extent, i.e. size, shape, or position. e.g. people, places, bowling balls, as well as abstract areas like cubes.</rdfs:comment>
    <rdfs:isDefinedBy rdf:resource="http://www.w3.org/2003/01/geo/wgs84_pos#"/>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#Service"/>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#Measurement"/>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#Geometry"/>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#CommunicationInterface"/>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#CommunicationProtocol"/>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#Color"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
    <rdfs:label xml:lang="en">Spatial thing</rdfs:label>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#DigitalRepresentation"/>
    <owl:disjointWith rdf:resource="https://w3id.org/def/saref4envi#CompassDirection"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A50">
    <owl:allValuesFrom rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#hasVersion"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A45">
    <owl:allValuesFrom rdf:resource="https://w3id.org/saref#Property"/>
    <owl:onProperty rdf:resource="https://w3id.org/saref#relatesToProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#isProjectedFromHeight">
    <rdfs:label xml:lang="en">is projected from height</rdfs:label>
    <rdfs:comment xml:lang="en">A relation between a light and the height measurement from which it is projected.</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/saref#isMeasuredIn">
    <rdfs:isDefinedBy>https://w3id.org/saref#</rdfs:isDefinedBy>
    <rdfs:comment xml:lang="en">is measured in</rdfs:comment>
    <rdfs:comment xml:lang="en">A relation between a measurement and the unit of measure in which the measurement value is expressed.</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </rdf:Description>
  <rdf:Description rdf:about="http://www.w3.org/2006/time#TemporalUnit">
    <rdfs:label xml:lang="en">Temporal unit</rdfs:label>
    <rdfs:isDefinedBy rdf:resource="http://www.w3.org/2006/time#"/>
    <rdfs:comment xml:lang="en">A temporal unit of measure, which provides a scale factor for a time quantity.</rdfs:comment>
    <rdfs:subClassOf rdf:resource="https://w3id.org/saref#UnitOfMeasure"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#hasFrequencyMeasurement">
    <rdfs:label xml:lang="en">has frequency measurement</rdfs:label>
    <rdfs:comment xml:lang="en">The relation between a device and the frequency in which it makes measurements.</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A44">
    <owl:allValuesFrom rdf:resource="https://w3id.org/saref#UnitOfMeasure"/>
    <owl:onProperty rdf:resource="https://w3id.org/saref#isMeasuredIn"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#hasColor">
    <rdfs:label xml:lang="en">has color</rdfs:label>
    <rdfs:comment xml:lang="en">A relation between a light emitted and its color.</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
  </rdf:Description>
  <rdf:Description rdf:nodeID="A53">
    <owl:allValuesFrom rdf:resource="https://w3id.org/def/saref4envi#LightPoint"/>
    <owl:onProperty rdf:resource="https://w3id.org/def/saref4envi#hasLightPoint"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Restriction"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/def/saref4envi#Irradiance">
    <rdfs:label xml:lang="en">Irradiance</rdfs:label>
    <rdfs:comment xml:lang="en">An individual representing the light property irradiance.</rdfs:comment>
    <rdf:type rdf:resource="https://w3id.org/def/saref4envi#LightProperty"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
  </rdf:Description>
  <rdf:Description rdf:about="http://www.wurvoc.org/vocabularies/om-1.8/reciprocal_hour">
    <rdfs:label xml:lang="en">Reciprocal hour</rdfs:label>
    <rdf:type rdf:resource="https://w3id.org/def/saref4envi#FrequencyUnit"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
  </rdf:Description>
  <rdf:Description rdf:about="https://w3id.org/saref#Property">
    <rdfs:label xml:lang="en">Property</rdfs:label>
    <rdfs:comment xml:lang="en">An aspect of an entity that can be observable by a sensor.</rdfs:comment>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#UnitOfMeasure"/>
    <owl:disjointWith rdf:resource="https://w3id.org/saref#Service"/>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
  </rdf:Description>
</rdf:RDF>
