OPML

OPML is an XML-based file format for representing hierarchical outlines, and is used most commonly for allowing transfer of lists of RSS subscriptions from a feed reader or from a podcast consuming client.

History

OPML was created by UserLand Software to store and share outlines, hierarchical text documents where child data could be hidden or expanded.

Subscription list / podcast list

Software that supports OPML export:

• iTunes — SuperUser question
• Instacast
• to be expanded

See also

• xoxo-opml-issues lists issues with OPML, documents the intricacies of the format and describes potential interoperability with xoxo
• List of XML-based formats