<?xml version="1.0"?>


<!DOCTYPE rdf:RDF [
    <!ENTITY owl "http://www.w3.org/2002/07/owl#" >
    <!ENTITY elements "http://purl.org/dc/elements/1.1#" >
    <!ENTITY xsd "http://www.w3.org/2001/XMLSchema#" >
    <!ENTITY owl2xml "http://www.w3.org/2006/12/owl2-xml#" >
    <!ENTITY rdfs "http://www.w3.org/2000/01/rdf-schema#" >
    <!ENTITY rdf "http://www.w3.org/1999/02/22-rdf-syntax-ns#" >
    <!ENTITY oboe-core "http://ecoinformatics.org/oboe/oboe.1.0/oboe-core.owl#" >
    <!ENTITY oboe-standards "http://ecoinformatics.org/oboe/oboe.1.0/oboe-standards.owl#" >
    <!ENTITY oboe-characteristics "http://ecoinformatics.org/oboe/oboe.1.0/oboe-characteristics.owl#" >
]>


<rdf:RDF xmlns="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#"
     xml:base="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl"
     xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
     xmlns:owl2xml="http://www.w3.org/2006/12/owl2-xml#"
     xmlns:oboe-core="http://ecoinformatics.org/oboe/oboe.1.0/oboe-core.owl#"
     xmlns:oboe-characteristics="http://ecoinformatics.org/oboe/oboe.1.0/oboe-characteristics.owl#"
     xmlns:owl="http://www.w3.org/2002/07/owl#"
     xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
     xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
     xmlns:elements="http://purl.org/dc/elements/1.1#"
     xmlns:oboe-standards="http://ecoinformatics.org/oboe/oboe.1.0/oboe-standards.owl#">
    <owl:Ontology rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl">
        <rdfs:label>Chemistry</rdfs:label>
        <owl:versionInfo>Version 1.0</owl:versionInfo>
        <rdfs:comment>Extension ontology for commonly used chemistry types in earth and environmental sciences.</rdfs:comment>
        <owl:imports rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-core.owl"/>
    </owl:Ontology>
    


    <!-- 
    ///////////////////////////////////////////////////////////////////////////////////////
    //
    // Annotation properties
    //
    ///////////////////////////////////////////////////////////////////////////////////////
     -->

    <owl:AnnotationProperty rdf:about="&elements;description"/>
    


    <!-- 
    ///////////////////////////////////////////////////////////////////////////////////////
    //
    // Datatypes
    //
    ///////////////////////////////////////////////////////////////////////////////////////
     -->

    


    <!-- 
    ///////////////////////////////////////////////////////////////////////////////////////
    //
    // Classes
    //
    ///////////////////////////////////////////////////////////////////////////////////////
     -->

    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Ammonium -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Ammonium">
        <rdfs:label xml:lang="en">Ammonium</rdfs:label>
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#CompoundSubstance"/>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#AmmoniumMoleToGram -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#AmmoniumMoleToGram">
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#SubstanceConversion"/>
        <rdfs:subClassOf>
            <owl:Restriction>
                <owl:onProperty rdf:resource="&oboe-core;hasOffset"/>
                <owl:hasValue rdf:datatype="&xsd;integer">0</owl:hasValue>
            </owl:Restriction>
        </rdfs:subClassOf>
        <rdfs:subClassOf>
            <owl:Restriction>
                <owl:onProperty rdf:resource="&oboe-core;hasTargetUnit"/>
                <owl:allValuesFrom>
                    <owl:Restriction>
                        <owl:onProperty rdf:resource="&oboe-core;standardFor"/>
                        <owl:allValuesFrom>
                            <owl:Restriction>
                                <owl:onProperty rdf:resource="&oboe-core;measurementFor"/>
                                <owl:allValuesFrom>
                                    <owl:Restriction>
                                        <owl:onProperty rdf:resource="&oboe-core;ofEntity"/>
                                        <owl:allValuesFrom rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Ammonium"/>
                                    </owl:Restriction>
                                </owl:allValuesFrom>
                            </owl:Restriction>
                        </owl:allValuesFrom>
                    </owl:Restriction>
                </owl:allValuesFrom>
            </owl:Restriction>
        </rdfs:subClassOf>
        <rdfs:subClassOf>
            <owl:Restriction>
                <owl:onProperty rdf:resource="&oboe-core;hasMultiplier"/>
                <owl:hasValue rdf:datatype="&xsd;decimal">18.03846</owl:hasValue>
            </owl:Restriction>
        </rdfs:subClassOf>
        <rdfs:subClassOf>
            <owl:Restriction>
                <owl:onProperty rdf:resource="&oboe-core;hasSourceUnit"/>
                <owl:allValuesFrom>
                    <owl:Restriction>
                        <owl:onProperty rdf:resource="&oboe-core;standardFor"/>
                        <owl:allValuesFrom>
                            <owl:Restriction>
                                <owl:onProperty rdf:resource="&oboe-core;measurementFor"/>
                                <owl:allValuesFrom>
                                    <owl:Restriction>
                                        <owl:onProperty rdf:resource="&oboe-core;ofEntity"/>
                                        <owl:allValuesFrom rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Ammonium"/>
                                    </owl:Restriction>
                                </owl:allValuesFrom>
                            </owl:Restriction>
                        </owl:allValuesFrom>
                    </owl:Restriction>
                </owl:allValuesFrom>
            </owl:Restriction>
        </rdfs:subClassOf>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#BrackishWater -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#BrackishWater">
        <rdfs:label>Brackish Water</rdfs:label>
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Water"/>
        <elements:description>Brackish water is a mixuter of fresh and saline water.</elements:description>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Carbon -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Carbon">
        <rdfs:label xml:lang="en">Carbon</rdfs:label>
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#ElementalSubstance"/>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Carbon12 -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Carbon12">
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Carbon"/>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Carbon13 -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Carbon13">
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Carbon"/>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Carbon14 -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Carbon14">
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Carbon"/>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#ChlorophyllTotal -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#ChlorophyllTotal">
        <rdfs:label xml:lang="en">Chlorophyll Total</rdfs:label>
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Pigment"/>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#CompoundSubstance -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#CompoundSubstance">
        <rdfs:label xml:lang="en">Compound Substance</rdfs:label>
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Substance"/>
        <rdfs:comment>Compound substances are mixtures of elemental substances.</rdfs:comment>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#ElementalSubstance -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#ElementalSubstance">
        <rdfs:label xml:lang="en">Elemental Substance</rdfs:label>
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Substance"/>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#FreshWater -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#FreshWater">
        <rdfs:label>Fresh Water</rdfs:label>
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Water"/>
        <elements:description>Fresh water is water where the dissolved substances do not typically include significnat quantities of the elements Sodium, Chlorine and Magnesium (check on Mg, or others). Other dissolved solids may be present in significant quantities.</elements:description>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#GroundWater -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#GroundWater">
        <rdfs:label>Groundwater</rdfs:label>
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Porewater"/>
        <elements:description>Groundwater seems to be mostly associated with terrestrial systems (check), and not beneath ocean sediments. So it is subclassed here. The assumtion being that porewater (parent) can be extracted from any sediment (marine, lakebed, streambed, earth, etc)</elements:description>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#H2O -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#H2O">
        <rdfs:label xml:lang="en">H2O</rdfs:label>
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#CompoundSubstance"/>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Hydrogen -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Hydrogen">
        <rdfs:label xml:lang="en">Hydrogen</rdfs:label>
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#ElementalSubstance"/>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Mixture -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Mixture">
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Substance"/>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Nitrate -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Nitrate">
        <rdfs:label xml:lang="en">Nitrate</rdfs:label>
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#CompoundSubstance"/>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Nitrite -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Nitrite">
        <rdfs:label xml:lang="en">Nitrite</rdfs:label>
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#CompoundSubstance"/>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Nitrogen -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Nitrogen">
        <rdfs:label xml:lang="en">Nitrogen</rdfs:label>
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#ElementalSubstance"/>
        <rdfs:comment>Nitrogen is a chemical element that has the symbol N, atomic number of 7 and atomic mass 14.00674 u. Elemental nitrogen is a colorless, odorless, tasteless and mostly inert diatomic gas at standard conditions, constituting 78.08% by volume of Earth&#39;s atmosphere.

The element nitrogen was discovered by Scottish physician Daniel Rutherford in 1772. Nitrogen occurs in all living organisms. It is a constituent element of amino acids and thus of proteins, and of nucleic acids (DNA and RNA). It resides in the chemical structure of almost all neurotransmitters, and is a defining component of alkaloids, biological molecules produced by many organisms.

Many important industrial compounds, such as ammonia, nitric acid, organic nitrates (propellants and explosives), and cyanides, contain nitrogen. The extremely strong bond in elemental nitrogen dominates nitrogen chemistry, causing difficulty for both organisms and industry in breaking the bond to convert the N2  into useful compounds, but releasing large amounts of often useful energy, when these compounds burn, explode, or decay back into nitrogen gas  (Wikipedia.org, 2010).</rdfs:comment>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Nitrogen14 -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Nitrogen14">
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Nitrogen"/>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Nitrogen15 -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Nitrogen15">
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Nitrogen"/>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Oxygen -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Oxygen">
        <rdfs:label xml:lang="en">Oxygen</rdfs:label>
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#ElementalSubstance"/>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#OxygenGas -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#OxygenGas">
        <rdfs:label xml:lang="en">Oxygen Gas</rdfs:label>
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#CompoundSubstance"/>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Phaeopigment -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Phaeopigment">
        <rdfs:label xml:lang="en">Phaeopigment</rdfs:label>
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Pigment"/>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Phosphate -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Phosphate">
        <rdfs:label xml:lang="en">Phosphate</rdfs:label>
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#CompoundSubstance"/>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Phosphorus -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Phosphorus">
        <rdfs:label xml:lang="en">Phosphorus</rdfs:label>
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#ElementalSubstance"/>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Pigment -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Pigment">
        <rdfs:label xml:lang="en">Pigment</rdfs:label>
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#CompoundSubstance"/>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Porewater -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Porewater">
        <rdfs:label>Porewater</rdfs:label>
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Water"/>
        <elements:description>porewater might be a synonym of interstitial water, that is, any water in sediments or unconsolidated layers.</elements:description>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#SalineWater -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#SalineWater">
        <rdfs:label>Saline Water</rdfs:label>
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Water"/>
        <elements:description>Saline water is a mixture of water (H20) and other dissolved constituents, typically significnat quantities of the elements Sodium, Chlorine and Magnesium </elements:description>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#SilicicAcid -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#SilicicAcid">
        <rdfs:label xml:lang="en">Silicic Acid</rdfs:label>
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#CompoundSubstance"/>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Silicon -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Silicon">
        <rdfs:label xml:lang="en">Silicon</rdfs:label>
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#ElementalSubstance"/>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Substance -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Substance">
        <rdfs:label xml:lang="en">Substance</rdfs:label>
        <rdfs:subClassOf rdf:resource="&oboe-core;Entity"/>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#SubstanceConversion -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#SubstanceConversion">
        <rdfs:subClassOf rdf:resource="&oboe-core;UnitConversion"/>
        <rdfs:subClassOf>
            <owl:Restriction>
                <owl:onProperty rdf:resource="&oboe-core;hasSourceUnit"/>
                <owl:allValuesFrom>
                    <owl:Restriction>
                        <owl:onProperty rdf:resource="&oboe-core;standardFor"/>
                        <owl:allValuesFrom>
                            <owl:Restriction>
                                <owl:onProperty rdf:resource="&oboe-core;measurementFor"/>
                                <owl:allValuesFrom>
                                    <owl:Restriction>
                                        <owl:onProperty rdf:resource="&oboe-core;ofEntity"/>
                                        <owl:allValuesFrom rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Substance"/>
                                    </owl:Restriction>
                                </owl:allValuesFrom>
                            </owl:Restriction>
                        </owl:allValuesFrom>
                    </owl:Restriction>
                </owl:allValuesFrom>
            </owl:Restriction>
        </rdfs:subClassOf>
        <rdfs:subClassOf>
            <owl:Restriction>
                <owl:onProperty rdf:resource="&oboe-core;hasTargetUnit"/>
                <owl:allValuesFrom>
                    <owl:Restriction>
                        <owl:onProperty rdf:resource="&oboe-core;standardFor"/>
                        <owl:allValuesFrom>
                            <owl:Restriction>
                                <owl:onProperty rdf:resource="&oboe-core;measurementFor"/>
                                <owl:allValuesFrom>
                                    <owl:Restriction>
                                        <owl:onProperty rdf:resource="&oboe-core;ofEntity"/>
                                        <owl:allValuesFrom rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Substance"/>
                                    </owl:Restriction>
                                </owl:allValuesFrom>
                            </owl:Restriction>
                        </owl:allValuesFrom>
                    </owl:Restriction>
                </owl:allValuesFrom>
            </owl:Restriction>
        </rdfs:subClassOf>
    </owl:Class>
    


    <!-- http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Water -->

    <owl:Class rdf:about="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Water">
        <rdfs:subClassOf rdf:resource="http://ecoinformatics.org/oboe/oboe.1.0/oboe-chemistry.owl#Mixture"/>
        <rdfs:comment>This class needs an object property &quot;has H2O&quot;.. 
It is very similarTo the the class &quot;wate mixturer&quot; in the SWEET ontolgy, which is  child of &quot;mixed chemical substance&quot;
TO DO: find sweet class and add similarConceptAs</rdfs:comment>
        <elements:description>Water, naturally occurring. Usually a mixture of H2O and other materials.</elements:description>
    </owl:Class>
</rdf:RDF>



<!-- Generated by the OWL API (version 3.2.2.1785) http://owlapi.sourceforge.net -->

