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<div class="moz-cite-prefix">Arthur Reutenauer wrote:<br>
<blockquote type="cite">there is a concept in Unicode, that of
grapheme cluster (<a class="moz-txt-link-freetext" href="http://unicode.org/glossary/#grapheme_cluster">http://unicode.org/glossary/#grapheme_cluster</a>)</blockquote>
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I am intrigued to know why Unicode defines a grapheme cluster in
terms of a <i>horizontally</i> segmentable unit of text :<br>
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<blockquote type="cite">A grapheme cluster represents a horizontally
segmentable unit of text,</blockquote>
Why not, I wonder, just a <i>segmentable</i> unit of text; are
there no grapheme clusters in vertically-written languages ?<br>
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Philip Taylor<br>
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