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<div class="moz-cite-prefix">On 10/8/20 8:40 AM, William_J_G
Overington via Unicode wrote:<br>
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<p><span style="display: inline !important; float: none; background-color: rgb(255, 255, 255); color: rgb(0, 0, 0); font-family: arial,sans-serif; font-size: 16px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: pre-wrap; word-spacing: 0px;">Doug Ewell wrote:
> Of course, I can create a program or a protocol that takes ordinary graphic characters such as < and >, and handles them in some special way, but then I am creating a new layer on top of plain text.
So could the twenty-seven control characters in the 1976 teletext specification be encoded as ordinary displayable characters in plane 14 such that they may, but need not, be used as control characters in such a program or protocol please?
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<p>Isn't that kind of what the Control Pictures block (U+2400)
is? Doug says you can decide that ordinary graphic characters
like < and > can be treated in some special way, creating
a new layer on top of plain text (Maybe call it something like
Xtra Main Layer, since it's another "main" layer atop plain
text. XML for short.) So if you're willing to do that, go
ahead and create a program or protocol that takes the ordinary
graphic characters U+2400 through U+2426 and handles them in
some special way, creating a new layer on top of plain text.</p>
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<p>All Doug said was that it's a free Internet, and you can write
a program that treats any data any way you want. The Control
Pictures block is almost tailor-made for you: you can decide to
treat them like the things they represent instead of the
pictures they are.</p>
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<p>(Or conversely, you could make a "show invisibles" program that
shows control characters with the graphical representations in
this block.)<br>
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<p>~mark<br>
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