custom type in Xml Schema

 

<?xml version="1.0" encoding="utf-8"?>
<xs:schema id="NavBar" targetNamespace="http://mytheme" elementFormDefault="qualified" xmlns="http://mytheme" xmlns:mstns="http://mytheme" xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:element name="Navs">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="Nav" minOccurs="0" maxOccurs="10000">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="Item" minOccurs="0" maxOccurs="10000">
                <xs:complexType>
                  <xs:sequence>
                  </xs:sequence>
                  <xs:attribute name="Href" type="xs:string" />
                  <xs:attribute name="Name" type="xs:string" />
                  <xs:attribute name="ID" type="xs:int" />
                </xs:complexType>
              </xs:element>
            </xs:sequence>
            <xs:attribute name="Name" type="xs:string" />
            <xs:attribute name="Type" type="NavType" />
          </xs:complexType>
        </xs:element>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
  <xs:simpleType name="NavType">
    <xs:restriction base="xs:string">
      <xs:enumeration id="Navigation" value="Navigation" />
      <xs:enumeration id="Category" value="Category" />
      <xs:enumeration id="Link" value="Link" />
    </xs:restriction>
  </xs:simpleType>
</xs:schema>