Overview and basic rules of WML Learning

Overview
The description language of WML (Wireless Markup Language-Wireless Markup Language) is the same as the HTML language we often hear. It belongs to the family of x ml language. The content written in HTML can be read in IE, Netscape, and other browsers on our PC, WML language files are specially used for display on wireless terminal display devices such as mobile phones. They can also provide users with human-computer interaction interfaces, accept the query and other information entered by the user, and then return the final information he wants to obtain to the user.

Basic Rules
* WML uses the XML document character set. Currently, Unicode 2.0 is supported. Unlike hdml, all WML labels, attributes, and specified acceptable values must be in lowercase, card names and variables are also case sensitive. Like hdml, only one space is displayed for consecutive null characters. The attribute values in the tag must be enclosed by "or". There cannot be spaces between the attribute names, =, and values. For unpaired tags, you must add/before>, for example, <br/>. The reference to variables is basically the same as that of hdml, including:
$ (Var1: ESC)
$ (Var1: noesc)
$ (Var1: UNESC)
For more information, see the relevant section of hdml. The reserved characters are also basically the same, and the replacement characters are:
<
>
''
""
&&
$
Space
-
It should be pointed out that in the URL transfer process, the & used to connect parameters must be converted &.