I have a question about all the blogs that are out there. Some allow you to post comments, including links. There seem to blogs that block searchengines, e.g. Google to index the comments and thus links. Can you tell me how you can see if the comments will be indexed or not? Is there some sort of html/robot line?

Thanks in advance!

NOFOLLOW

For example, if you see the following:
<a href="ww*.whatever.com" rel="nofollow">LinkTitle</a></td>

NOFOLLOW

For example, if you see the following:
<a href="ww*.whatever.com" rel="nofollow">LinkTitle</a></td>

Thanks for your comment Redfly, works for me.

Kind regards.

There seem to blogs that block searchengines, e.g. Google to index the comments and thus links.
RedFly is correct about nofollow when it comes to links in comments not being followed by search engines. Important to note, "comments" and "links in comments" are two different items.

Can you tell me how you can see if the comments will be indexed or not?
Comments are often indexed even if they contain "nofollow links" to other sites. In other words, comments can be indexed without the links they contain to other sites being followed and/or indexed.

For example, Matt Cutts's website uses "nofollow" tags for links in comments but the comments are still indexed.

http://www.google.com/search?hl=en&q=site%3Amattcutts.com+comments

To see if comment pages and thus comments are blocked from search engines it's a good idea to check out the sites robots.txt.

Best of luck to you!:)