<?xml version="1.0" encoding="utf-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:vc="http://www.w3.org/2007/XMLSchema-versioning" vc:minVersion="1.1" elementFormDefault="unqualified" xmlns:xml="http://www.w3.org/XML/1998/namespace" xmlns:sawsdl="http://www.w3.org/ns/sawsdl">
  <xs:include schemaLocation="../time-instant/schema.xsd"/>
  <xs:import namespace="http://www.w3.org/XML/1998/namespace" schemaLocation="http://www.w3.org/XML/1998/namespace"/>
  <xs:include schemaLocation="../date-type/schema.xsd"/>
  <xs:complexType name="time_reference">
    <xs:choice>
      <xs:element name="time_interval">
        <xs:complexType sawsdl:modelReference="http://www.w3.org/2006/time#Interval">
          <xs:annotation>
            <xs:documentation xml:lang="en">
              Time interval - A temporal entity with an extent or duration
            </xs:documentation>
            <xs:documentation xml:lang="es">
              intervalo de tiempo - Una entidad temporal con una extensión o duración.
            </xs:documentation>
          </xs:annotation>
          <xs:sequence>
            <xs:element minOccurs="0" name="iri" type="xs:anyURI"/>
            <xs:element name="beginning_time_instant" type="time_instant" sawsdl:modelReference="http://www.w3.org/2006/time#hasBeginning">
              <xs:annotation>
                <xs:documentation xml:lang="en">
                  has beginning - Time instant representing the beginning of a temporal interval.
                </xs:documentation>
                <xs:documentation xml:lang="es">
                  tiene principio - Comienzo de una entidad temporal.
                </xs:documentation>
              </xs:annotation>
            </xs:element>
            <xs:element name="end_time_instant" type="time_instant" sawsdl:modelReference="http://www.w3.org/2006/time#hasEnd">
              <xs:annotation>
                <xs:documentation xml:lang="en">
                  has end - Time instant representing the end of a temporal interval.
                </xs:documentation>
                <xs:documentation xml:lang="es">
                  tiene fin - Final de una entidad temporal.
                </xs:documentation>
              </xs:annotation>
            </xs:element>
            <xs:element minOccurs="0" name="date_information" sawsdl:modelReference="https://model.ccmm.cz/vocabulary/datacite#dateInformation">
              <xs:annotation>
                <xs:documentation xml:lang="en">
                  date information - Additional information to the date in text form.
                </xs:documentation>
              </xs:annotation>
              <xs:complexType>
                <xs:simpleContent>
                  <xs:extension base="xs:string">
                    <xs:attribute ref="xml:lang" use="required"/>
                  </xs:extension>
                </xs:simpleContent>
              </xs:complexType>
            </xs:element>
            <xs:element name="date_type" type="date_type" sawsdl:modelReference="https://model.ccmm.cz/vocabulary/ccmm#hasType">
              <xs:annotation>
                <xs:documentation xml:lang="en">
                  has date type - Reference to the codelist of date types.
                </xs:documentation>
              </xs:annotation>
            </xs:element>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="time_instant">
        <xs:complexType sawsdl:modelReference="http://www.w3.org/2006/time#Instant">
          <xs:annotation>
            <xs:documentation xml:lang="en">
              Time instant - A temporal entity with zero extent or duration.
            </xs:documentation>
            <xs:documentation xml:lang="es">
              instante de tiempo. - Una entidad temporal con una extensión o duración cero.
            </xs:documentation>
          </xs:annotation>
          <xs:sequence>
            <xs:element minOccurs="0" name="iri" type="xs:anyURI"/>
            <xs:element minOccurs="0" name="date_information" sawsdl:modelReference="https://model.ccmm.cz/vocabulary/datacite#dateInformation">
              <xs:annotation>
                <xs:documentation xml:lang="en">
                  date information - Additional information to the date in text form.
                </xs:documentation>
              </xs:annotation>
              <xs:complexType>
                <xs:simpleContent>
                  <xs:extension base="xs:string">
                    <xs:attribute ref="xml:lang" use="required"/>
                  </xs:extension>
                </xs:simpleContent>
              </xs:complexType>
            </xs:element>
            <xs:element name="date_type" type="date_type" sawsdl:modelReference="https://model.ccmm.cz/vocabulary/ccmm#hasType">
              <xs:annotation>
                <xs:documentation xml:lang="en">
                  has date type - Reference to the codelist of date types.
                </xs:documentation>
              </xs:annotation>
            </xs:element>
            <xs:choice>
              <xs:element name="date_time" type="xs:dateTime" sawsdl:modelReference="http://www.w3.org/2006/time#inXSDDateTime"/>
              <xs:element name="date" type="xs:date" sawsdl:modelReference="http://www.w3.org/2006/time#inXSDDate"/>
            </xs:choice>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
    </xs:choice>
  </xs:complexType>
  <xs:element name="time_reference" type="time_reference"/>
</xs:schema>
