What does the term XML mean?
XML (Extensible Markup Language) is a W3C recommendation to generate markup languages for special needs
It is one of the subtypes of SGML (acronym for Standard Generalized Markup Language) capable of describing different types of data. Its main purpose is the ease of sharing information through the internet.
XML-based languages include XHTML (format for Web pages), RDF, SDMX, SMIL, MathML (format for mathematical expressions), NCL, XBRL, XSIL and SVG (vector graphic format). The main characteristic of XML, of creating a unique infrastructure for several languages, is that unknown and little-used languages can also be defined without further work and without the need to be submitted to the standardization committees.