User`s manual

IPL T SF Series • Communication and Control
alphanumerics
special characters
reserved characters
0-9 a-z A-Z
$ _ _ . + ! * ( ) ,
; / ? : @ = &
When used for their reserved purposes, these
characters do not require encoding within a URL.
4-41
Figure 4-30b — Browser view
URL encoding
URL encoding is the method of using ASCII hexadecimal
characters to display specific characters in a URL. URL
encoding is used for several reasons. On some operating
systems, certain characters are unsafe or not available, and
others are reserved by the HTML or URL specification. URL
encoding is used to ensure compatibility and functionality with
most Internet browsers. As a general rule, use the hexadecimal
encoding method shown below when these characters appear in
your URLs.
The following types of characters do not require encoding in a
URL.