fax — A fax telephone number
The fax element contains a telephone number that can be used to connect to a facsimile machine. The phone number is not required to be in a specific format. (See phone for examples of numbers.)
fax may be contained in these elements: contact
Indicates the location that the phone number connects to. This attribute is optional.
<fax location="work">(123) 456-7890</fax>