-- The created files have a `.xhtml` extension and *need* to be served
- with a `application/xhtml+xml` (or `application/xml`) media type. Not
- all servers know how to serve `.xhtml` files; if this is you, you may
- have better luck with `make XHTMLEXT=xml` (which will produce `.xml`
- files instead).
+Any `.atom` files you provide will automatically be filled out with
+`<id>`s, `<updated>` values, and other necessary information before
+being copied to the destination location. If you wish to use this
+feature, you will need to provide a `BASEIRI` variable when you run
+`make` to allow the X·S·L·T to transform relative links into absolute
+ones.