Finding Item:
There are some RSS websites that do not have links as new Items, They are embedded as headlines and stories. In which case I need to parse the Item tag right from there.
I imagine there's a better way to do this but you can look at the structure of that particular file and figure out what you need to pull out. I see
$rss->{channel}->{link}
as being the kind of thing you're asking about, but there's no item there, just
a link (and other elements of the channel).
LWP::UserAgent
It is reliable for me to use modification time. Does the modification time change when page changes, meaning is it RSS feed requirement?
Yes and no, like Anonymous Monk
said.