<p><b>REPLACING_VERSIONS and REPLACED_BY_VERSION</b></p>

		<p>

			The <c>REPLACING_VERSIONS</c> variable contains a

			whitespace-separated list of all versions (<c>PVR</c>) of this

			package that are being replaced (uninstalled or overwritten) as a

			result of this install. It is a list, not a single optional value,

			to handle pathological cases such as installing <c>foo-2:2</c> to

			replace <c>foo-2:1</c> and <c>foo-3:2</c>.

		</p>

		<p>

			<c>REPLACING_VERSIONS</c> is valid in <c>pkg_preinst</c> and

			<c>pkg_postinst</c>. In addition, it may be available in

			<c>pkg_pretend</c> and <c>pkg_setup</c>, although you should take

			care to handle binary package creation and installation correctly

			when using it in these phases.

		</p>

		<p>

			The <c>REPLACED_BY</c> variable contains the single version

			(<c>PVR</c>) of this package that is replacing us, if we are being

			uninstalled as part of an install, or an empty string otherwise.

			It is valid in <c>pkg_prerm</c> and <c>pkg_postrm</c>.

		</p>

	</li>

	<li>