XML is an acronym for extensible markup language. It is a compromise between machine language and regular text. It resembles HTML (and can be mixed with HTML in some cases to make XHTML). It looks like this:
<?xml version="1.0" encoding="UTF-8"?> <location> <country>France <region>Île-de-France <department>Hauts-de-Seine <arrondissement>Antony <canton>Châtenay-Malabry <university>École Centrale Paris</university> </canton> </arrondissement> </department> </region> </country> </location>
The tags are readable by humans with some effort, and machines can parse XML as a data tree. Subtitle formats are sometimes written in XML.