I created a content type called news items in drupal 7. How do I tell D7 to create an RSS feed of ONLY news items?
When I go to /rss.xml, it displays all content types, which is too much. I only need news items.
You can use the Views module to create feeds. Simply add a new display of type "Feed" and customize the view to contain only the content you want. Be sure to choose a path for your feed so that it can be accessed.
To add a "Feed" display:
Go to your views administration and select the view you want to edit. Towards the top of the page you will see the "Displays" heading with an "+ Add" button. Click that and select "Feed" (See image below). You will then have a Feed display that is using the Default Display's settings.