Wayland Primary Selection Protocol, version 1
The primary selection extension allows copying text by selecting it and pasting it with the middle mouse button.
Used in the Qt Wayland platform plugin
The sources can be found in qtwayland-opensource-src-y7uiaX/qtwayland-opensource-src-5.15.2/src/3rdparty/protocol/wp-primary-selection-unstable-v1.xml.
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