Modularization with XML Schemas

• In file xhtml-image.xsd:

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

      <xs:element name="img">

          <xs:complexType>

              <xs:attribute name="longdesc" type="xs:string"/>

              <xs:attribute name="src" type="xs:anyURI"/>

              ...

          </xs:complexType>

      </xs:element>

  </xs:schema

• In XHTML-XX schema:

  <include schemaLocation="xhtml-image-1.xsd">