OPML is a standard way desktop and Web-based news aggregators can import and export
their subscription lists.
Several versions are available:
- Nested with categories. Newer aggregators will preserve the
nested categries in the feed list (like folders). Some older or buggy aggregators might
have problems with the nesting.
- Flat, but sorted by categories
It is highly doubtful you will want to use all feeds. Please ensure you delete/disable
feeds that do not interest you once you have imported the entire master feed list.