WML special characters

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:
<& Lt;
> & Gt;
'& Apos;
"& Quot;
& Amp;
$
Space & nbsp;
-& Shy;
It should be pointed out that in the URL transfer process, the & used to connect parameters must be converted to & amp ;.