sax xsd

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">

    <!-- types validation-->
    <xs:simpleType name="typeType">
        <xs:restriction base="xs:string">
            <xs:enumeration value="House"/>
            <xs:enumeration value="Premises"/>
        </xs:restriction>
    </xs:simpleType>

    <xs:simpleType name="doubleType">
        <xs:restriction base="xs:double">
            <xs:minInclusive value="0"/>
        </xs:restriction>
    </xs:simpleType>

    <xs:simpleType name="integerType">
        <xs:restriction base="xs:integer">
            <xs:minInclusive value="0"/>
        </xs:restriction>
    </xs:simpleType>

    <!-- main element -->
    <xs:element name="realState">
        <xs:complexType>
            <xs:sequence>
                <xs:element name="estate" type="stateType" minOcours="1" maxOcours="unbounded"/>
            </xs:sequence>
          <!--<xs:attribute name="title"></xs:attribute>-->
        </xs:complexType>
  </xs:element>

    <!-- child elements -->
    <xs:complexType name="estateType">
        <xs:sequence>
            <xs:element name="type" type="typeType"/>
            <xs:element name="surface" type="doubleType"/>
            <xs:element name="address" type="addressType" />
            <xs:element name="price" type="doubleType"/>
        </xs:sequence>
    </xs:complexType>


    <xs:complexType name="addressType">
        <xs:sequence>
            <xs:element name="street" type="xs:string"/>
            <xs:element name="number" type="integerType"/>
            <xs:element name="floor" type="integerType"/>
            <xs:element name="door" type="integerType"/>
        </xs:sequence>
    </xs:complexType>

</xs:schema>