XML and the importance of being an object

Recently, the Web consortium released the XML Schema specification, which is an elegant and powerful way of expressing an XML data instance´s general object structure. Schema essentially replace data-type definitions and uses an XML syntax to specify object structure. For those familiar with object-oriented languages such as Java, Schema plays a similar role to classes. The sophisticated data structures XML allows are helpful in expressing information in many fields, and many communities developing XML-based standards are exploiting the object structures