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It certainly does look like Google is treating these sites specially. When you see results from discussion forums in Google search results it contains various helpful bits of information, like dates and numbers of replies. So it looks like Google has written custom parsers for various popular forum engines. This blog post from 2009 announces it as a feature ...

There is no definitive timeframe. In fact, there's no guarantee Google will use breadcrumbs in their search results for your pages. As with anything related to Google displaying search results, you can give them clues and express your wishes as for what to display in the search results but ultimately Google will decide if and when it will happen. All you can ...

Is Google treating these sites specially? As paulmorriss mentioned, Google does apply an algorithmic means for identifying forums and, interestingly enough, Yahoo Answers and Ask.MetaFilter show similar snippets (search "Does my dog have fleas?" or "What does my cat think I am?" ... ?!) so it's quite possible that Google is treating sites with a few key ...

From schema.org: This site provides a collection of schemas, i.e., html tags, that webmasters can use to markup their pages in ways recognized by major search providers. Search engines including Bing, Google and Yahoo! rely on this markup to improve the display of search results, making it easier for people to find the right web pages. Many ...

Google recommends using microdata, but it does support three formats: microdata, microformats, and RDFa. A big reason to choose microdata would be that the examples that Google gives on it's website and those on schema.org are in the microdata format. Here is a site that has a huge table of the various advantages and disadvantages of the three formats. ...

I used the instructions on the article How To Implement Rel=Author for creating my page. The only difference is that I had two rel=author links instead of one. I then tested the page with Google's rich snippets testing tool, and the first author that was linked was displayed as if it were the only author. The second author was not displayed at all. Multiple ...

Here is your example HTML in the testing tool. Works perfectly fine for me, with everything you say is a problem recognized, and no warning: The example code from Google's docs does display the warning, but that's because of a syntax error which is breaking the markup: <img class="photo" src="anvil_executive.jpg /> Note the src attribute is ...

According to the HTML5 Working Draft: The author keyword may be used with link, a, and area elements. This keyword creates a hyperlink. For a and area elements, the author keyword indicates that the referenced document provides further information about the author of the nearest article element ancestor of the element defining the hyperlink, ...

It means the page that link points to will contain a list of links to other pages that are tagged by the anchor text of that link. For example, if a link looked like this: <a href="/tags/seo" rel="tag">SEO</a> The microformat tells the search engine, and any other user-agent, that the URL /tags/seo contains links to documents (i.e. pages, etc) ...

No, you don't need to duplicate the HTML exactly: microdata schemas are based on the microdata attributes. It doesn't matter (usually; e.g. links are an exception) what HTML tag those attributes are applied to. You may want to start by reading "Getting started with schema.org", if you haven't already.

Honestly, I have a feeling it is about as elusive as getting Google Sitelinks. My recommendation is to follow the Google guide for Rich Snippits and when the site gets enough PageRank and keywords hits, it will naturally start appearing. Also be sure to watch your webmaster tools closely and address any issues Google finds. There is also a section called ...

My site had not yet had the rating and reviews index under my links, where other websites have and they use the bare minimum. Also, having the same micro formats on multiple pages affect this too? Just because you use microformats doesn't mean Google will automatically include rich snippets with your listing. Just like sitelinks they only do ...

There currently is no microformatting for Q&A data. But I wouldn't be surprised to see it in the future as I can't imagine that the current few available formats are all there's going to be. I'm sure as microformats get flushed out and working examples become more prevalent we'll see an increase in the available microformats. Hopefully they'll be ...

You need sufficient competition offering semantically extractable reviews on-line otherwise Google has nothing to compare your offerings with and won't display them. Try to get customers of your competitors to fill in local business reviews (especially if they had a bad time) this will help. Remember that this is made all the more difficult as you are ...

Choosing which one is better for you is (IMO) somewhat subjective. Here are a couple factors that may help you to make an informed decision: RDFa is problematic for non-XHTML web pages (though support appears to be emerging), and has a bit of a learning curve when dealing with nested entities (see the Google example for Address) Facebook's Open Graph ...

Unfortunately none of those formats are suitable for what you do. What you're offering is a service and although each of the rich snippets formats support Products, services are really quite different things. There's some discussion of the need for something on services on the Microformats wiki There is a need for a specific microformat dedicated to ...

I couldn't find any author-specific information, but the HTML specs do allow you to define more than one link with the same relationship, e.g. <link rel="alternate" hreflang="de" href="//de.example.com/my/page.htm"> <link rel="alternate" hreflang="en-gb" href="//uk.example.com/my/page.htm"> <link rel="alternate" type="application/rss+xml" ...

I don't think I've ever seen a name for that particular widget, but it's not one of the listed rich snippet types. But also note that the rich snippets come from information you provide, generally via microdata, and that's not what's going on here. The stock information is basically just some embedded information from Google's own Finance site. If you ...

rel=author is part of HTML5, so you don't have to link it to a Google profile. However Google are saying that if you link it to a Google profile then they may display your picture in search results. They are choosing to use their search engine product to promote their profile product. This post is more reassuring: The markup uses existing standards such ...

There is no schema entry for FAQ, you most likely best of adding it as a 'WebPage'. or using the about. It's not required to use rich snippets for all pages. It holds little SEO weight if any. Google will be able to establish it as a FAQ page without any markup of this type.

No using RDFa, microdata, richsnippets, and HTML5 does not help your rankings in search engines. If you use Google rich snippet testing tool they'll actually tell you if a page will potentially appear in search results with rich snippets or not. For example a page using hCard but with a lot of other content on that page google may determine the main ...

Yes, that is the way they are implemented. You can use them as an attribute to a tag. I just took the logical div and span tags that already existed in the template and added the needed attributes. Something along the line of: <div class="product-block" itemscope itemtype="http://schema.org/Product"> <img ...

For all intents and purposes, the <article /> tag acts like (and, apparently, is treated by Google as) a microformat. Microformats.org proposes similar HTML5 conventions' relevance to existing microformats.

I don't know of a microformat specifically for interviews, but you could combine definition lists (with the question as the term, the answer as the description) with Google's author markup.

Despite being (as of today) way too short for a subject like this, the Wikipedia article about Microdata (HTML5) still puts the relationship between the three common semantic markup approaches nicely: Microdata can be viewed as an extension of the existing microformat idea which attempts to address the deficiencies of microformats without the complexity ...

Microformats are much simpler to understand and implement, using additional classes on existing HTML elements (or additional span/div elements where necessary). RDFa on the other hand is more complex and can be difficult to implement, using attributes like xmlns:v and values like v:Person. Like JasonBirch says it's a little problematic for non-XHTML pages ...

I don't see why you have an issue with this. It's common to have identical information on multiple pages in HTML so why not microformats as well? If that same information was in an HTML table then you would include it on both places, right? As long as each ID is unique and you're not trying to manipulate the system or creating duplicate content I wouldn't ...