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However, as far as I can tell there's no way to tag business hours, so I'm interested if there's a known way in which I can make that clearer to Google. Also, I'm interested how Google recognizes that a comment on a particale website is a review? G maps sometimes pulls reviews from other sites, does anyone know what signals they rely on for this?
<abbr class="geo" title="Lat;Long>
<strong class="fn org">Business Name</strong></abbr><br />
<span class="street-address">Street Address</span><br />
<span class="locality">Town/City Name</span>,
<span class="postal-code">Zip Code</span>
<span class="country-name">USA</span><br />
<abbr class="type" title="voice">Telephone: </abbr>
<span class="value">Telephone Number</span>
<span class="category">Category 1</span>,
<span class="category">Category 2</span>,
<span class="category">Category 3</span>
[edited by: inbound at 11:26 pm (utc) on April 13, 2009]
[edit reason] Removed (already examplified) Specifics [/edit]
If you just wanted to do that with markup then the microformats hCard [microformats.org] standard might allow you to put extra information in a field, but not with that specificity.
Google has contracts with well-known review sites, so this is what I see in Australia. I am not seeing "little" sites coming up in the ones I checked.