4) that combines more natural criteria determine
the components to be used.
12.4 Selecting an XKB Keymap Using Rules
Rule-based keymap selection is much easier and more common than componentbased
selection. Rule-based selection uses five parameter values: Rules, Model,
Layout, Variant, and Option.
The Rules value dictates the possible values for each of the other four parameters.
For example, if the Rules value is sun, you can specify the Model type4, but that
model name is not available if you are using the xorg rules.
The five parameters are described here:
Rules
Selects the rules used to compose the keyboard map based on the other parameters.
The possible values for this parameter are listed in the text file rules/
rules.lst or the multilanguage XML file rules/rules.xml (typically xorg.lst and
xorg.xml). The .lst (or .xml) files are an essential reference when configuring a
keyboard using XKB. As distributed, the possible values for this parameter are
xorg (or base, the default), sun, sgi, and xfree98 (for computers that conform to
the Japanese PC98 standard). XFree86 systems use the value xfree86 in place of
xorg.
Model
Indicates the actual keyboard model installed. There are generic model numbers
(such as pc105) for run-of-the-mill keyboards, and special model numbers for
specific multimedia, wireless, and ergonomic keyboards.
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