A globally unique identifier derived from an Internet domain. GlobalNames are used as identifiers of browsers, its engines and possibly other objects.
If you own e.g. example.com
, you can define GlobalNames in this context.
GlobalNames look like sub-domains – e.g. my-browser.example.com
or super-engine.web-division.example.com
.
Definition of GlobalNames in this namespace is completely up to the domain owner – the names do not have to be registered anywhere and the corresponding subdomains even do not have to exist in DNS. As the base domain for GlobalNames should be used such one, which will be in long term maintained and owned by the same person/subject, which owns the named object.
In place of a GlobalName can be used also a ShortName, if defined.
Works as an alias for a GlobalName. ShortNames are defined only for some GlobalNames, typically the frequently used ones. Defined ShortNames are listed in this specification.
An umbrella term for GlobalNames and ShortNames.
A string that specifies version of an object (browser, engine etc.). Consists of one or more parts separated by a single dot. Most significant part is the left one – this is usually major version. Examples:
26
1.2.3
3.2
There are two possible protocols to be used in User-Agent URI:
user-agent://
https://
or http://
The user-agent://
pseudo protocol
means that all information is contained in the URI itself
– the URI is only a global identifier and a data container
– not a link to any other source.
The URI with https://
(or http://
) protocol
can carry the same information
but beside that it works also as a link to the XML document
which contains more details about the user agent.
The domain part of the URI carry the GlobalName (or its ShortName) which identifies the browser. Example:
user-agent://cool-browser.example.com/?some=other&parts=etc
Globally identifies the browser with GlobalName
cool-browser.example.com
.
In the URI following codes can be used to specify particular attributes:
code | name | type | description |
b
|
browser name | TheName | name of the browser; if this parameter is missing, the value is taken from the domain part (see above) |
bv
|
browser version | VersionString | version of the browser |
e
|
browser's engine | TheName | name of the engine used in this browser |
ev
|
engine version | VersionString | version of the engine |
d
|
device class | enum |
class of the device, possible values are:
|
x
|
X-resolution | integer | horizontal resolution of the screen in pixels |
y
|
Y-resolution | integer | vertical resolution of the screen in pixels |
dpi
|
DPI | integer | number of dots/pixels of the screen (display) where the web page is viewed |
Following ShortNames of browsers are defined.
ShortName | GlobalName | description |
ff
|
firefox.ua.mozilla.org
|
Mozilla Firefox |
User-Agent URI, open standard and free software © 2014-2022 GlobalCode