ACUS - topic

["eberhard speer jr." <se...@ducis.net>]

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Hi again,

here's a quick sketch of a relevant topic :

I identify 3 different methods of device detection :

- - Resolve/Map : 'real' DDR : 'known' elements in an user-agent string
allow it to be mapped to a 'record' in a device database which returns
properties of the device. [returns info not contained in ua-string]

- - Parse : 'read' and interpret 'known' elements in an user-agent
string and return results. [returns only info contained in ua-string]

- - Probe : run javascript on the connected client and have it return
the properties found. [returns supported navigator properties]

For one and the same user-agent string the 3 methods are likely to
return 'contradicting' results.
Explaining why this is shows that these 'contradictions' add valuable
information about the device/user-agent [and its user] in certain
use-cases [traffic analysis] while in other cases choosing the wrong
method leads to 'errors' [content formatting].

Understanding the differences between the methods and their results is
rather vital for getting the device-detection thing right.

esjr
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