What does Z variant mean for Han?

From: Eric Muller (emuller@adobe.com)
Date: Tue Jul 09 2002 - 19:54:03 EDT

In the description of the Han script (section 10.1), the Z axis is
described by:

    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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