dwc/docs/xml/tdwg_dwc_class_terms.xsd

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema 
    version="2023-09-14" 
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
    targetNamespace="http://rs.tdwg.org/dwc/terms/"
    xmlns:chrono="http://rs.tdwg.org/chrono/terms/"
    xmlns:dwc="http://rs.tdwg.org/dwc/terms/">
    <xs:include schemaLocation="tdwg_dwcterms.xsd"/>
    
    <xs:annotation>
        <xs:documentation>
            This schema redefines all Darwin Core classes to disallow compound objects - 
            within a class no other nested class is allowed. It allows properties to 
            occur in any order and as many times as needed.
        </xs:documentation>
    </xs:annotation>

    <!-- OCCURRENCE domain -->
    <xs:element name="Occurrence" substitutionGroup="dwc:anyClass">
        <xs:complexType>
            <xs:choice maxOccurs="unbounded">
                <xs:element ref="dwc:anyIdentifier"/>
                <xs:element ref="dwc:anyOccurrenceTerm"/>
                <xs:element ref="dwc:anyRecordLevelTerm"/>
            </xs:choice>
        </xs:complexType>
    </xs:element>
    
    <!-- ORGANISM domain -->
    <xs:element name="Organism" substitutionGroup="dwc:anyClass">
        <xs:complexType>
            <xs:choice maxOccurs="unbounded">
                <xs:element ref="dwc:anyIdentifier"/>
                <xs:element ref="dwc:anyOrganismTerm"/>
                <xs:element ref="dwc:anyRecordLevelTerm"/>
            </xs:choice>
        </xs:complexType>
    </xs:element>
    
    <!-- MATERIALSAMPLE domain -->
    <xs:element name="MaterialEntity" substitutionGroup="dwc:anyClass">
        <xs:complexType>
            <xs:choice maxOccurs="unbounded">
                <xs:element ref="dwc:anyIdentifier"/>
                <xs:element ref="dwc:anyMaterialEntityTerm"/>
                <xs:element ref="dwc:anyRecordLevelTerm"/>
            </xs:choice>
        </xs:complexType>
    </xs:element>
    
    <!-- MATERIALSAMPLE domain -->
    <xs:element name="MaterialSample" substitutionGroup="dwc:anyClass">
        <xs:complexType>
            <xs:choice maxOccurs="unbounded">
                <xs:element ref="dwc:anyIdentifier"/>
                <xs:element ref="dwc:anyMaterialSampleTerm"/>
                <xs:element ref="dwc:anyRecordLevelTerm"/>
            </xs:choice>
        </xs:complexType>
    </xs:element>
    
    <!-- EVENT domain -->
    <xs:element name="Event" substitutionGroup="dwc:anyClass">
        <xs:complexType>
            <xs:choice maxOccurs="unbounded">
                <xs:element ref="dwc:anyIdentifier"/>
                <xs:element ref="dwc:anyEventTerm"/>
                <xs:element ref="dwc:anyRecordLevelTerm"/>
            </xs:choice>
        </xs:complexType>
    </xs:element>
    
    <!-- LOCATION domain -->
    <xs:element name="Location" substitutionGroup="dwc:anyClass">
        <xs:complexType>
            <xs:choice maxOccurs="unbounded">
                <xs:element ref="dwc:anyIdentifier"/>
                <xs:element ref="dwc:anyLocationTerm"/>
                <xs:element ref="dwc:anyRecordLevelTerm"/>
            </xs:choice>
        </xs:complexType>
    </xs:element>  
    
    <!-- GEOLOGICALCONTEXT domain -->
    <xs:element name="GeologicalContext" substitutionGroup="dwc:anyClass">
        <xs:complexType>
            <xs:choice maxOccurs="unbounded">
                <xs:element ref="dwc:anyIdentifier"/>
                <xs:element ref="dwc:anyGeologicalContextTerm"/>
                <xs:element ref="dwc:anyRecordLevelTerm"/>
            </xs:choice>
        </xs:complexType>
    </xs:element>  

    <!-- IDENTIFICATION domain -->
    <xs:element name="Identification" substitutionGroup="dwc:anyClass">
        <xs:complexType>
            <xs:choice maxOccurs="unbounded">
                <xs:element ref="dwc:anyIdentifier"/>
                <xs:element ref="dwc:anyIdentificationTerm"/>
                <xs:element ref="dwc:anyRecordLevelTerm"/>
            </xs:choice>
        </xs:complexType>
    </xs:element>
    
    <!-- TAXON domain -->
    <xs:element name="Taxon" substitutionGroup="dwc:anyClass">
        <xs:complexType>
            <xs:choice maxOccurs="unbounded">
                <xs:element ref="dwc:anyIdentifier"/>
                <xs:element ref="dwc:anyTaxonTerm"/>
                <xs:element ref="dwc:anyRecordLevelTerm"/>
            </xs:choice>
        </xs:complexType>
    </xs:element>

    <!-- MEASUREMENTORFACT domain -->
    <xs:element name="MeasurementOrFact" substitutionGroup="dwc:anyClass">
        <xs:complexType>
            <xs:choice maxOccurs="unbounded">
                <xs:element ref="dwc:anyIdentifier"/>
                <xs:element ref="dwc:anyMeasurementTerm"/>
                <xs:element ref="dwc:anyRecordLevelTerm"/>
            </xs:choice>
        </xs:complexType>
    </xs:element>
    
    <!-- RESOURCE RELATIONSHIP domain -->
    <xs:element name="ResourceRelationship" substitutionGroup="dwc:anyClass">
        <xs:complexType>
            <xs:choice maxOccurs="unbounded">
                <xs:element ref="dwc:anyIdentifier"/>
                <xs:element ref="dwc:anyResourceRelationshipTerm"/>
                <xs:element ref="dwc:anyRecordLevelTerm"/>
            </xs:choice>
        </xs:complexType>
    </xs:element>
    
    <!-- CHRONOMETRIC AGE domain -->
    <xs:element name="ChronometricAge" substitutionGroup="dwc:anyClass">
        <xs:complexType>
            <xs:choice maxOccurs="unbounded">
                <xs:element ref="dwc:anyIdentifier"/>
                <xs:element ref="dwc:anyChronometricAgeTerm"/>
                <xs:element ref="dwc:anyRecordLevelTerm"/>
            </xs:choice>
        </xs:complexType>
    </xs:element>    
</xs:schema>