Wireless Markup Language
An industry-standard markup language for creating special, small web sites optimized for phones.
WML was a core feature of the WAP 1.x standard.
WML has generally been phased out in favor of the newer xHTML standard, part of WAP 2.0.
Most phones support both WAP 1.x (WML and WAP 2.0 (XHTML). Older phones may only support WAP 1.x (WML) sites.