It was originally developed in about 1996 by Unwired Planet, the company that became Phone.com and then Openwave. HDML was submitted to W3C for standardization, but was not turned into a standard. Instead it became an important influence on the development and standardization of WML, which then replaced HDML in practice. Unlike WML, HDML has no support for scripts.
↑Blass, Steve (October 11, 1999). "Ask Dr. Intranet What does HDML stand for and what is its purpose?". Network World. Vol.16, no.41. IDG. p.41. ISSN0887-7661.
↑Dragan, Richard V. (March 6, 2001). "Internet Pro, Wireless by Design". PC Magazine. Vol.20, no.5. Ziff Davis. p.IP04. ISSN0888-8507.