Verified
XML is a project of the W3C that is World Wide Web Consortium, and the development of the specification is supervised through an XML Working Group. The Special Interest Group of co-opted experts and contributors by different fields contributed comments and reviews through email.
XML is a public format: this is not a proprietary development of any company, though the membership of the WG and the SIG shown companies as well as academic and research institutions. The v1.0 specification was accepted through the W3C like a Recommendation on Feb 10, year 1998.