1998 February 10th
W3C published the final recommendation for the XML 1.0 specification. Extensible Markup Language (XML) is a general markup language designed to easily exchange information between applications and to publish documents that contain at least partially structured data. XML is a simplified subset of the older SGML language. The XML language does not deal with document layout and consistently separates form and content. For different types of data, XML allows you to create custom markup languages (applications). By combining XML with HTML, the new XHTML markup language was created in 2000.