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<appendix id='canonical_key_types'>
<title>Canonical Key Types</title>
<sect1 id='Canonical_Key_Types'>
<title>Canonical Key Types</title>
<sect2 id='The_ONE_LEVEL_Key_Type'>
<title>The ONE_LEVEL Key Type</title>
<para>
The <emphasis>
ONE_LEVEL</emphasis>
key type describes groups that have only one symbol. The default <emphasis>
ONE_LEVEL</emphasis>
type has no map entries and does not pay attention to any modifiers.
</para>
</sect2>
<sect2 id='The_TWO_LEVEL_Key_Type'>
<title>The TWO_LEVEL Key Type</title>
<para>
The <emphasis>
TWO_LEVEL</emphasis>
key type describes groups that have two symbols but are neither alphabetic nor
numeric keypad keys. The default <emphasis>
TWO_LEVEL</emphasis>
type uses only the <emphasis>
Shift</emphasis>
modifier. It returns level two if <emphasis>
Shift</emphasis>
is set, level one if it is not.
</para>
</sect2>
<sect2 id='The_ALPHABETIC_Key_Type'>
<title>The ALPHABETIC Key Type</title>
<para>
The <emphasis>
ALPHABETIC</emphasis>
key type describes groups that consist of two symbols — the lowercase form
of a symbol followed by the uppercase form of the same symbol. The default
<emphasis>
ALPHABETIC</emphasis>
type implements locale-sensitive "shift cancels caps lock" behavior using both
the <emphasis>
Shift</emphasis>
and <emphasis>
Lock</emphasis>
modifiers as follows:
</para>
<itemizedlist>
<listitem>
<para>If <emphasis>
Shift</emphasis>
and <emphasis>
Lock</emphasis>
are both set, the default <emphasis>
ALPHABETIC</emphasis>
type yields level one.
</para>
</listitem>
<listitem>
<para>If <emphasis>
Shift</emphasis>
alone is set, it yields level two.
</para>
</listitem>
<listitem>
<para>If <emphasis>
Lock</emphasis>
alone is set, it yields level one but preserves the <emphasis>
Lock</emphasis>
modifier.
</para>
</listitem>
<listitem>
<para>If neither <emphasis>
Shift</emphasis>
nor <emphasis>
Lock</emphasis>
are set, it yields level one.
</para>
</listitem>
</itemizedlist>
</sect2>
<sect2 id='The_KEYPAD_Key_Type'>
<title>The KEYPAD Key Type</title>
<para>
The <emphasis>
KEYPAD</emphasis>
key type describes that consist of two symbols, at least one of which is a
numeric keypad symbol. The default <emphasis>
KEYPAD</emphasis>
type implements "shift cancels numeric lock" behavior using the <emphasis>
Shift</emphasis>
modifier and the real modifier bound to the virtual modifier named "NumLock"
(the "NumLock" modifier) as follows:
</para>
<itemizedlist>
<listitem>
<para>If <emphasis>
Shift</emphasis>
and the "NumLock" modifier are both set, the default <emphasis>
KEYPAD </emphasis>
type yields level one.
</para>
</listitem>
<listitem>
<para>If either <emphasis>
Shift</emphasis>
or the "NumLock" modifier alone are set, it yields level two.
</para>
</listitem>
<listitem>
<para>If neither <emphasis>
Shift</emphasis>
nor the "NumLock" modifier are set, it yields level one.
</para>
</listitem>
</itemizedlist>
</sect2>
</sect1>
</appendix>
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