gentoo-overlay/app-accessibility/orca/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
<herd>gnome-accessibility</herd>
<use>
	<flag name="braille">Enable braille support</flag>
</use>
<longdescription>
    Orca is a flexible, extensible, and powerful assistive technology
    for people with visual impairments. Using various combinations of
    speech synthesis, braille, and magnification, Orca helps provide
    access to applications and toolkits that support the AT-SPI (e.g.,
    the GNOME desktop).
</longdescription>
</pkgmetadata>