Extensible Markup Language (XML)

"Extensible Markup Language (XML)" Please respond to the following:

• XML provides a method for data to be transferred between systems. Specify at least three components of an XML document. Analyze how each component ensures data reliability and validation.
• Identify at least two e-Commerce systems that provide XML data integration. For each system, describe how XML extensions could enable e-Commerce integration among system stakeholders such as vendors, resellers, suppliers, and customers.