Characters in the Non-Spacing Characters screen appear in the same space as
another character. Non-spacing characters are important in Arabic, Hebrew, and
the languages of the Indian subcontinent. In the GENERIC_M sort, the characters
are mostly diacritical marks. For example, one of them is °,
which can appear in the same space as a to create å.
The non-spacing characters are shown in a tree structure, with branches representing
primary, secondary, and tertiary sort levels. The primary, secondary, and tertiary
sort levels are a way of classifying characters. The sort level that is shown
is irrelevant to the sort order. The characters are sorted in the order that
you see from the top to the bottom of the screen. Each entry is called a node.
In the GENERIC_M sort, for example, all of the nodes appear at the secondary
sort level, and their sort order is shown from the top to the bottom of the
tree.
NOTE: The Unicode values (UTF-16) in the collation screens appear with an
x instead of a u.
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