Default Values for Attributes (2)

• #IMPLIED
  No default value. This attribute need not be used.

     <!ELEMENT img EMPTY>
     <!ATTLIST img
                  alt CDATA #REQUIRED
	          src CDATA #REQUIRED
	          width CDATA #IMPLIED
	          height CDATA #IMPLIED>

       <img src="xmlj.jpg" alt="XMLJ Image" width="300"/>