RSS is a file format source and doesn’t actually know anything about where it gets the entries from. The answer really is: “how can an http request get only the newest results from a server” and the answer is Conditional GET source. Http also supports Conditional PUT. This is an article about using this feature … Read more
pubDate: The original publication date for the channel or item. (optional) lastBuildDate: The most recent time the content of the channel was modified. (optional) Here are some docs for the optional items in the RSS 2.0 spec.
From Google Chrome you can update the url like so and you will get the raw xml: view-source:http://feeds.feedburner.com/TheAppleBlog
Found an up-to-date library (1) that uses Google News RSS. The URL new format seems to be: Top news: https://news.google.com/news/rss By major topic: https://news.google.com/news/rss/headlines/section/topic/{topic} Where {topic} is one of the following values: WORLD NATION BUSINESS TECHNOLOGY ENTERTAINMENT SPORTS SCIENCE HEALTH By any/custom topic: Once at https://news.google.com, browse to the desired topic, for example this. Identify … Read more
You might be able to find it by looking at the source of the home page (or blog). Look for a line that looks like this: <link rel=”alternate” type=”application/rss+xml” title=”RSS Feed” href=”http://example.org/rss” /> The href value will be where the RSS is located.
RSS/Atom feeds does not allow for historic information to be retrieved. It is up to the publisher of the feed to provide it if they want such as in the blogger or wordpress examples you gave above. The only reason that Google Reader has more information is that it remembered it from when it came … Read more
Neither. It’s application/rss+xml http://www.rssboard.org/rss-mime-type-application.txt