gentoo-overlay/dev-haskell/dlist/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
	<herd>haskell</herd>
	<longdescription>
		Differences lists: a list-like type supporting O(1) append.
		This is particularly useful for efficient logging and pretty
		printing, (e.g. with the Writer monad), where list append
		quickly becomes too expensive.
	</longdescription>
</pkgmetadata>