Where is the documentation for the clipboards?

[ToddAndMargo]

Hi All,

I am not finding anything about the two clipboards over on
    https://www.x.org/releases/current/doc/libX11/libX11/libX11.html

Is "clipboard" the wrong keyword to search for?

Also, are there any examples out there in C land on how to read
and write to the two clipboards?

Many thanks,
-T

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