RSS/Atom Feed for website - rss

I am new to RSS/Atom feeds and there are a couple of points that I don't quite understand from doing some basic research.
Firstly, how do I tell if a website has an RSS/Atom feed? I can't see an icon for it on the website but is there anything else I can look at that will give me an indication that there is a feed?
Secondly, if there isn't an RSS/Atom Feed, is it going to be possible to create an RSS/Atom feed that will always be up-to-date without being a webmaster of the site? I am essentially wanting to use an RSS/Atom feed to get web pages that have products that are going to be resold on another website. Is this going to be possible if these pages aren't already in an RSS/ATOM feed? I know there are tools that allow you to make an RSS Feed of any webpage but I believe you have to re-do it if any content changes.
Thanks for your time.

To find out if a site offers an RSSAtom feed, use feed auto-discovery.
No, if you're not the publisher of the site, you can't publish an RSS feed which is consistently up to date.

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Using OpenGraph to pull content onto my site?

So a company I'm working with gets mentioned in the media from time to time (BBC & other big news sites).
Is anyone aware of fees / licenses we will need to use the content that BBC etc provides using OpenGraph and post that content on our site?
So essentially we want a little card on our site with the page title, OG image, URL and possibly the description, when the user clicks this it will open the original page/link on the original source site.
I can't see too much info out there other than sharing on facebook, not using OpenGraph on our site.
Can anyone share some knowledge? Cheers!
If I get your question correctly, you want to retrieve posts on the BBC site, scrape the information and show in your own site, right?
Does the site of BBC, and possible others, provide a feed where you can subscribe to? In that case, you could monitor that feed for any mentions of your company.
Alternatively, you can use one of Facebook's partners that use the Keyword Insights API. There you can set up monitoring for your company name and integrate with their API.

How to get news from another website via RSS

I have a blog and I want some automatically - generated news on it. I have found a few news websites which generate RSS feeds and I want to auto-post them to my blog.
I have done this using the WP-o-Matic plugin, but since the RSS feed's content is limited to some point, the entire news' text does not show up on my blog.
Is there a way to get the whole content of the post the RSS feed is linking to ?
You're going to have to code this yourself. Let's say you subscribe to an RSS feed for Google News. You can parse their feed to get the original URL of the summarized article, but then you're going to have to make a request to that URL and fetch the content on that page. Unless the source happens to make whole articles available via its own RSS feed (unlikely), you're probably in markup-scraping territory.
Have to say this: consider the ethical/legal implications of duplicating entire original content on your site (as opposed to summary snippets), even with proper attribution.
For people that need a solution to the problem I described ..
There are services like:
http://fulltextrssfeed.com/
http://fullrss.net/
http://www.wizardrss.com/
You can use them to do the job for you. They fetch the RSS feed, crawl the websites and extract the full articles for you. After that, they provide a RSS feed of their own with the extracted data.
You can combine the extracted data (the RSS feed the service provides you with) with a wordpress plugin like WP-o-Matic. That way the plugin connects to the RSS feed of the service and the service extracts the content from the original RSS feed.
Have in mind that those services are not perfect. Due to complex website layouts, these services might be unable to find the content, or include things that are not a part of the articles. A manual check of the output is advised.
To the services alrady listed at the top, you can also check http://www.FeedsAPI.org , FeedsAPI brings to the table that it takes the process of posting the articles directly to your secret blog email for you, so all you need to do is manage the publication in the wordpress admin, and you can also get it targeting a specific feed to receive the results you want. Anothe alternative will be the combinations of one of those services with IFTTT . I hope this could help.

Unable to get Number of Comments

I' am using RSS Feeds generated from WordPress Blogs to fetch some Information. WordPress is just too good in providing comprehensive information about a Post and it is quite easy to extract Number of Comments for a Post in RSS Feed. Now the problem is that I didn't find any way to get Number of Comments from RSS Feeds generated by Drupal and Joomla Blogs.
Is there any way to do this?
Any help would be really appriciated.
Have you tried using feedburner by google? feedburner.google.com/ I have in the past had the same issue and for some reason running it through feedburner first seemed to help.
Here is a cool Drupal module that may help you. If your rss field is not generated by views. First Move it into views. Then use this module to output the comment count as a field
http://drupal.org/project/views_rss
Otherwise you'll need to do some theme overrides in the template layer. Drupal does not provide a default method for customizing the core rss feed.

Fetch Feeds from another site

How to fetch rss feeds from another site and show according to month wise, week wise...
I want to accomplish this in wordpress can anyone suggest me how to fetch the feeds. I have url and thats all nothing extra, is there any plugin or widget available? Or can you give an idea how to do this.
Thanks in advance.
use google feed api key for your feed url..
you can google it..
https://developers.google.com/feed/
tutorial
http://www.javascriptkit.com/dhtmltutors/googleajaxfeed.shtml
its simple.

bunch of RSS to blog?

Is there a ready available service that turns a bunch of RSS feeds into a blog like tumblr or posterous?
Thanks
If you mean a load of RSS feeds into a blog-like display, you could try Yahoo pipes. Popular services like Blogger and Tumblr have javascript widgets too. Then there's Feedburner.
Subscribe to the feeds in Google Reader, give them a common label and in the settings make the label public. This will create a public URL to a web page with the latest entries.
The page is a simple display, without features like commenting.

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