How can subscribers be informed that an already published item has changed?

Question

I want to implement a very simple RSS feed for my FAQ website.

Subscribers will be informed about new questions / answers. It's great.

But the questions will have significant changes in the content from time to time (for example, when the best answer to the question will be found). Can RSS inform subscribers that such a response has changed?

If not, what could be a good workaround? I am thinking of proposing another RSS feed that only announces changes to existing issues. Is this the "right way"?

Answer 1

, .

RSS, , , , .

, , , , :

• Light pinging , URL- , ,
• Fat pinging ,

(fat-ping) Google, PubSubHubbub. , Blogger, Youtube, MySpace, Tumblr Wordpress. , Github, wiki, , .

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Answer 2

- , XML node , node , :

sml-, , if, $title..

<?php
$title = 'My awesome title';
/** Here your php code to get the content and assign variable to all nodes **/
$title_old = $title; /** Get the info your xml script or cached XML data **/
$title_new = 'My awesome title'; /** Use YOUR new value! - requestt the content again after someone clicked the save button or use a crontab to get info on changes every x minutes, hours or days **/
if($title_new == $title_old){
   $title_changed = 'No changes detected to the title node';
    echo $title_changed . ': The title is &quot;' . $title . '&quot;';
  }else{
   $title_changed = 'The title node has been changed';
     echo $title_changed . ': The new title is &quot;' . $title . '&quot;';
}
?>

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Answer 3

You can format the links so that they include the hash and / or ID of the last response. Thus, the links will be perceived as fresh, and if you have a custom feed reader, it can track if the link is new or has been read by the user.