<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xmlns:xs="http://www.w3.org/2001/XMLSchema"
           xmlns:html="http://www.w3.org/1999/xhtml"
           xmlns:hfp="http://www.w3.org/2001/XMLSchema-hasFacetAndProperty">
  <xs:element name="SigmodRecord">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="issue">
          <xs:complexType>
            <xs:sequence>
              <xs:element maxOccurs="1" name="volume" type="xs:string"/>

              <xs:element maxOccurs="1" name="number" type="xs:string"/>

              <xs:element maxOccurs="1" name="articles">
                <xs:complexType>
                  <xs:sequence>
                    <xs:element maxOccurs="1" name="title" type="xs:string"/>

                    <xs:element maxOccurs="1" name="initPage" type="xs:string"/>

                    <xs:element maxOccurs="1" name="endPage" type="xs:string"/>

                    <xs:element maxOccurs="1" name="authors">
                      <xs:complexType>
                        <xs:sequence>
                          <xs:element name="author">
                            <xs:complexType>
                              <xs:complexContent>
                                <xs:extension base="xs:string">
                                  <xs:attribute name="position"/>
                                </xs:extension>
                              </xs:complexContent>
                            </xs:complexType>
                          </xs:element>
                        </xs:sequence>
                      </xs:complexType>
                    </xs:element>
                  </xs:sequence>
                </xs:complexType>
              </xs:element>
            </xs:sequence>
          </xs:complexType>
        </xs:element>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>
