Has the XDG Base Directory Specification been adopted by an official standards committee? In my previous life, calling something a standard carried a great deal

Has the XDG Base Directory Specification been adopted by an official standards committee? In my previous life, calling something a standard carried a great deal of weight. For example, contracts could mandate compliance with standards. Having built apps and CLI tools for macOS, the author's post certainly makes sense to me. Calling something a standard without backing from a standards committee seems odd, however.