URL=http://someservice.com/atom-feed/;Cache Location=C:\cache.db;Auto Cache=true;Offline=false;
To retrieve data from the cache, use table name + "#Cache" in sql query. Example for an Atom feed would be SELECT * FROM [AtomFeed#Cache]
This connection string (Caching data using RSS Data Provider) can be used for connections to
RSS / Atom.
Start over in the connection string reference index.
You can also get help in the Q&A forums where you can ask your own question.
The kb articles contains how-tos and instructions and you can search for anything if you're not sure were to look.