library-forme-dtd.xsd

<?xml version="1.0" encoding="utf-8" ?>

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">

  <xs:element name="title" type="xs:string" />
  <xs:element name="author" type="xs:string" />
  <xs:element name="year" type="xs:string" />
  <xs:element name="edition" type="xs:string" />
  <xs:attribute name="type" type="xs:string" />

  <xs:element name="document">
    <xs:complexType>
      <xs:sequence>
        <xs:element ref="title" />
        <xs:element ref="author" maxOccurs="unbounded" />
        <xs:element ref="year" />
        <xs:element ref="edition" minOccurs="0" />
      </xs:sequence>
      <xs:attribute ref="type" />
    </xs:complexType>
  </xs:element>

  <xs:element name="documents">
    <xs:complexType>
      <xs:sequence>
        <xs:element ref="document" maxOccurs="unbounded" />
      </xs:sequence>
    </xs:complexType>
  </xs:element>

  <xs:element name="library">
    <xs:complexType>
      <xs:sequence>
        <xs:element ref="documents" />
      </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>