Rss app

[eluser]garymardell[/eluser]
Hey, if i were to create an application that can parse rss feeds and display them, what is the best way to store that the item has been read.

I guess i will need a table to store the url of the feeds. But how would i go about marking certain feeds as read. Would i have to add the data from the feeds into the database?
Giving each item a unique id and then when viewing the feed try to get any new content and add that to the database.

I really don't know. If someone could suggest a way of making it work that would be appreciated.