XML is a more powerful language than HTML because it implements more SGML recommendations. Some advantages of XML over HTML are listed in the following table. The markup describes the way in which the data is to be displayed in the browser. The markup describes the data itself. Developers must use a limited set of predefined tags.
Developers create tags and can therefore describe any type of data.
Searching for and updating data is difficult because the same set of tags can be used for different types of data. Searching for and updating data is easy because each type of data has a unique set of tags that define it. The way in which data is to be displayed in the browser is controlled. XML does not have any control over the way data is displayed. Although XML gives developers control over data, it does not control how the data appears in a browser.