XML (Extensible Markup Language)

Do you know what is worse than XML? Pseudo XML: stackoverflow.com/questions/5558502/is-html5-valid-xml/39560454#39560454

XML predecessor.

SGML predecessor.

XPath kind of died with the rise of CSS selectors around the beginnning of the 2010's. But that is a shame. XPath is a good standard, and was generally more powerful than CSS selectors for many many years.