XML (eXtensible Markup Language)

XML (eXtensible Markup Language): A widely used system for defining data formats. XML provides a very rich system to define complex documents and data structures such as invoices, molecular data, news feeds, glossaries, inventory descriptions, real estate properties, etc. As long as a programmer has the XML definition for a collection of data (often called a "schema") then they can create a program to reliably process any data formatted according to those rules. From Matisse

* Linux/Unix/Computing Glossary Index