User`s manual
IPL T SF24 and IPL T SFI244 • Communication and Control
IPL T SF24 and IPL T SFI244 • Communication and Control
Communication and Control, cont’d
Figure 4-31b — 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 insure 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:
Characters
Miscellaneous Characters
" "
<
>
#
%
{
}
|
\
^
~
[
]
`
Pound
Space
Percent
Quotation Marks
“Less Than” Symbol
“Greater Than” Symbol
Left Curly Brace
Right Curly Brace
Vertical Bar / Pipe
Backslash
Caret
Tilde
Left Square Bracket
Right Square Bracket
Grave Accent
20
23
22
3C
3E
25
7B
7D
7C
5C
5E
7E
5B
5D
60
Hex
32
35
123
125
124
92
94
126
91
93
96
34
60
62
37
Dec
Characters
$
&
+
,
/
:
;
=
?
@
Dollar
Ampersand
Plus
Comma
Forward Slash / Virgule
Colon
Semi-colon
Equal
Question Mark
“At” Symbol
24
26
2B
2C
2F
3A
3B
3D
3F
40
36
38
43
44
47
58
59
61
63
64
Hex Dec
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.
4-394-38
Reserved characters
Reserved characters should not be encoded when they appear
in their conventional meaning in a URL. For example, do not
encode the slash (/) when using it as part of the URL syntax.
Only encode unsafe characters (defined below) in your URLs.
The following table lists reserved characters.
Unsafe characters
URLs use some characters for “special use” in defining their
syntax and these characters should be encoded. For various
reasons, these characters present the possibility of being
misunderstood within a URL.
The following table lists unsafe characters.