In the description of the Han script (section 10.1), the Z axis is
The actual shape (typeface) attribute (the Z axis) is for
differences of type design (the actual shape used in imaging) of
each variant form.
Let's take the concrete example of U+5516 and U+555E, with kZVariant
entries pointing at each other in Unihan.txt.
Does Z variant mean that all the glyphs which are acceptable to
represent U+5516 are also acceptable to represent U+555E, and
conversely? Of course, some shapes may be more appropriate in some
circumstances, much like a Fraktur shape may be more appropriate than a
Roman shape in some circumstances.
Does it go as far as making folding from one character into the other a
useful operation, assuming one is not interested in perfect
round-tripping with other character standards?
If a document that contains U+5516 is rendered, and one does a
copy/paste from a rendering of that document, is it acceptable to paste
Are the answers to those questions different for other pairs of
characters that are z variant one of the other?
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