Extron electronic IPL T PC1i URL encoding, Reserved characters, Character, Hexadecimal, Decimal

URL encoding

URL (Universal Resource Locator) encoding is the method of using ASCII hexadecimal characters to display specific characters in a URL. It 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:

Alphanumeric characters	0-9,a-z,A-Z
Special characters	$ _	-	. + ! * ( ) ,
Reserved characters	; /	?	: @ = &

NOTE: When used for their reserved purposes, these characters do not require encoding within a URL.

Figure 37. Characters that Do Not Require Encoding

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 in the table in the next section) in your URLs.

The following table lists reserved characters.

Character		Hexadecimal	Decimal
$	Dollar	24	36
&	Ampersand	26	38
+	Plus	2B	43
,	Comma	2C	44
/	Forward slash or virgule	2F	47
:	Colon	3B	59
=	Equal	3D	61
?	Question mark	3F	63
@	“At” symbol	40	64

IPL T PC1 • HTML Configuration and Control 42