posting corrections to news items

I can't think how to best title this question in a few words.

On my website I have a news page where I like to post news on a few issues that I like to keep up on. As I go through the news archives on my page I can see that my reporting on certain stories has improved. When I go back in the archives even further I can see errors here and there, grammar or factual, and I correct them. I also try to add reference links to those older articles to make them more useful. Some end up getting updated and refined many many times.

I post the date it was written at the top and the date last updated at the bottom of the news item. If I were to add another part to the page displaying the news item that posts at the bottom of the page in a list or comment format what was changed when what would be the best way to go about it? For example, I could list the changes at the bottom in a smaller font, I could add a link to go to another page that lists all of the changes, I could use a collapsible div.

As an example here is one of my news items.

Just curious what ideas on this layout project people might have.

Why not just update the text and make a note of the last update? If you want you could show the older version in case someone would refer to it. But basing this on a forum model, there's no problem just changing the text.

That is an option too. That is what I currently do actually. It might be a good idea then to leave things as they are. Adding notation of exactly what has changed when I make corrections to a news post might not add to the quality of the page in this case.

If what you're interested in is letting the visitors track changes, then one option is to track text differences by comparing an earlier version to the current version.

I use this:
http://pear.php.net/package/Text_Diff/redirected
It works well and it's fast.

It's annoying to install and I recommend setting up your own function (eg, gettextdiff($a,$b)) since the defaults are a little hard to work with.

Basically it gives you <ins> and <del> tags that you can style using CSS as you'd like. I use colors and strikethrough/underline.