gentoo-overlay/app-text/mathtex/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
<maintainer>
	<email>maintainer-needed@gentoo.org</email>
</maintainer>
<use>
<flag name='png'>Generate png images by default instead of gif</flag>
</use>
<longdescription>
 MathTeX parses a LaTeX math expression and immediately emits the corresponding
 gif (or png) image.  It can be used as cgi program to embed LaTeX math in your
 own html pages, blogs, wikis, etc. Just place an html img tag in your
 document wherever you want to see the corresponding LaTeX expression. Take a
 look at homepage for examples.
</longdescription>
</pkgmetadata>