The OPML Format is used to give a list of RSS feeds. The structure looks like:
<opml version="1.0" >
<head>
<text>Tested CMLRSS Feeds</text>
</head>
<body>
<outline isOpen="true" id="575110174" text="Blogs" >
<outline htmlUrl="http://chem-bla-ics.blogspot.com/"
title="chem-bla-ics"
version="RSS"
type="rss"
xmlUrl="http://www.woc.science.ru.nl/devel/egonw/chem-bla-ics.atomxml"
id="1455608623"
text="chem-bla-ics"
description="chem-bla-ics" />
</outline>
</body>
</opml>