<?xml version="1.0" encoding="UTF-8" ?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <xsd:element name="foo" type="foo-type" />
  <xsd:complexType name="item-type">
    <xsd:all>
      <xsd:element name="product-name" type="xsd:string"
       minOccurs="1" maxOccurs="1"/>
      <xsd:element name="quantity" type="xsd:decimal"
       minOccurs="1" maxOccurs="1"/>
    </xsd:all>
  </xsd:complexType>
  <xsd:complexType name="foo-type">
    <xsd:sequence>
      <xsd:element name="items" minoccurs="1" maxOccurs="1">
        <xsd:complexType>
          <xsd:sequence>
            <xsd:element name="item" type="item-type"
             minOccurs="0" maxOccurs="unbounded" />
          </xsd:sequence>
        </xsd:complexType>
      </xsd:element>
    </xsd:sequence>
  </xsd:complexType>
</xsd:schema>
