For a general description of opml, we recommend Opml on Wikipedia.

Opml readers

Most RSS readers support import and export of collections of feed urls / attributes as opml files.

Opml generation using eZ

It might be possible to create an ezopmldesign extension based on the ezxmldesign extension.

Some users of eZ publish rss features might need to export the rss feed lists as opml files.

External reference