Basic OPML is pretty well-supported, but text/uri-list is a better format for the most common use of OPML (a collection of RSS/Atom feeds). It's a little funny seeing projects pull in full-blown XML parsers just to not really handle anything besides URL/name pairs. (E.g [1].)

If you have a project where the ability to import/export OPML is on the roadmap but you haven't added it yet, consider taking a few minutes to implement text/uri-list first.

1. <https://github.com/Automattic/pocket-casts-android/blob/864d...>