Copyleft Symbol

Ken Shirriff ken.shirriff at
Mon Feb 15 10:15:57 CST 2016

My advice:

The most important thing is to have enough examples of the symbol in use in
running text (i.e. not an icon or logo). Real published documents that
demonstrate a user community are important.

I recommend studying Unicode's Criteria for Encoding Symbols
<> carefully.

The rules for emoji are totally different, so saying "but emoji..." is

The proposal <>to add the power symbol to
Unicode is a good proposal example that you can use as a model.

As far as the copyleft symbol, it's well-defined (has a wikipedia page) and
a web search shows demand for the symbol. It is used in running text and
has semantic meaning. You found it goes back to 2000, so it's not a
transient fad. I think a proposal would have a good chance of success if
you can find a number of good examples of usage.

This is my personal advice - I don't speak for anyone - but I've had a
couple symbols accepted so these guidelines work for me.


On Sun, Feb 14, 2016 at 3:36 PM, David Faulks <davidj_faulks at>

> Hello,
> This subject has been discussed before, but I am somehwat uncertain about
> something:
> If the copyleft (reversed ©) symbol was proposed for encoding, with
> examples (from PDF files) showing it being used in a similar way to the
> copyright © symbol, it is likely to be accepted for encoding?
> Thanks for any opinions.
> David
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