.HDM File Extension
File TypeHDML File
File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.
What is an HDM file?
Web page written in the Handheld Device Markup Language (HDML); designed for portable electronic devices, such as smartphones and PDAs; HDML files are transferred to devices using HDTP (the Handheld Device Transport Protocol) rather than HTTP, which is used for .HTML pages.
HDML files commonly use the .HDML file extension.